Eat the frog? What research says about doing the hardest task first

"Eat a live frog first thing in the morning, and nothing worse will happen to you the rest of the day." The line is usually credited to Mark Twain, and Brian Tracy's book Eat That Frog! turned it into a whole productivity system: find the hardest, most important task on your list and do it first.

Twain almost certainly never said it. Quote Investigator traced the idea to the 18th-century French writer Nicolas Chamfort, whose version was about swallowing a toad, and found no sign of it in Twain's writing; the Twain credit seems to appear only in the late 1980s. The advice is still worth testing on its own merits. Here is what research on task order found, about both what people prefer and what it does to their work and their confidence, and when it makes sense to warm up instead.

What people actually do: the easy one first

Left to choose, most people start with the easy tasks, and the busier they are, the stronger the pull.

Emergency doctors. Diwas KC, Bradley Staats, Maryam Kouchaki and Francesca Gino studied six years of records from a large city hospital's emergency department, looking at which of the waiting non-urgent patients each physician picked next. As their workload rose, physicians were more likely to pick the simpler cases, a habit the authors call task completion preference. On a shift it looked productive: more patients seen. Once the authors adjusted for how complex the work was, the easy-first habit went with worse throughput, and with slower learning over time. A lab experiment pointed to two causes: tiredness, and the good feeling of finishing something.

Radiologists. In an earlier study of 2.4 million diagnoses, Maria Ibanez, Jonathan Clark, Robert Huckman and Bradley Staats found that radiologists often skipped ahead in their queue to batch similar scans and to take the ones they expected to finish fastest. Using cases assigned at random as a comparison, they found those choices lowered productivity, and taking the shortest tasks first was particularly costly.

Neither study says easy tasks don't matter. They say that when the choice is yours and you are under load, the easy option feels like progress and isn't always.

What hard-first does to confidence

The most direct test of the frog advice is a 2020 paper by Rachel Habbert and Juliana Schroeder at UC Berkeley, "To build efficacy, eat the frog first". Across six experiments and a supplemental one, with 2,013 participants online, they asked two questions: which order do people expect to make them feel more capable, and which order actually does?

What people predicted. In the first experiment, 60% of people chose to do word analogies in order of increasing difficulty, easy first, expecting it to build their confidence. In a word-search version, 53% chose easy first and only 22% hard first (the rest didn't mind).
What happened. People who actually did the rounds hardest first ended up rating their own skill higher than people who went easy first: 6.13 against 4.62 on a 10-point scale, with a random order in between at 5.26. The number of analogies they got right didn't differ meaningfully between orders.
Why people get it wrong. In a final experiment the authors found that when people imagine a sequence of tasks, they dwell on how it starts (struggling with the hardest one) more than on how it ends (sailing through the easiest). Easy first ends on the hardest task, which is the feeling you walk away with.

Easy first ends on the hardest task, and that is the feeling you walk away with.

So, in these experiments at least, the frog advice was right about confidence and neutral about output, and most people's instinct pointed the other way.

When to warm up instead

Hard-first is a default, not a law. A few situations where something else should go first:

Urgent beats hard

The emergency department study looked at non-urgent patients; the urgent ones were seen first regardless. The same goes for a kitchen or a site. The supplier who needs an answer before 10, the permit that has to be signed before the crew can start, the task that blocks three other people: these go first even when they are easy, because someone else is waiting on them.

Your peak is not always the morning

"First thing in the morning" assumes the morning is when you think best. Research on time of day suggests people do demanding, focused work better at their own peak, which for evening types is later in the day. One small study (Wieth and Zacks, 2011) even found students solved more insight puzzles, the kind that need a fresh angle, at their off-peak time, while plain analytical problems showed no time-of-day effect. For someone who closes a restaurant at midnight, the frog belongs in the first good hour of their day, whenever that is.

A frog you cannot start

If the hard task is so vague that you circle it all morning, the first job is to make it startable: write the first physical step, or do two minutes of it. Our piece on why you put things off covers the two-minute start. And if the frog keeps taking all day, it may be a planning problem rather than a willpower one; see the planning fallacy.

Real warm-ups

Some work genuinely needs one: a cook sets up the station before the first ticket, a crew checks tools before the lift. That is preparation for the hard task, not avoidance of it. The test is whether the warm-up has an end.

Doing it on a list

Pick the frog the evening before. One task, the one you'd be most relieved to have done. Put it at the top of the list so it is the first thing you see.
Do it in your first focused block, after anything genuinely urgent and before email, messages and the small tasks that will happily take the whole morning.
On a team, watch who takes what. The emergency department pattern applies to crews too: when everyone is busy, the quick jobs get claimed and the hard one sits in To do. A lead who puts a name on the hard task in the morning avoids finding it untouched at 4.

In tick-tock-done you can drag a task to the top of a list, mark it high priority, or say it into the voice page as you leave work ("call the inspector tomorrow, high priority"). On a team board, a hard task with nobody's name on it stands out in the To do column.

What the research does not show

The Habbert and Schroeder tasks were short lab puzzles (analogies and word searches) done online in minutes. They measured confidence, not the quality of a day's real work, and nobody has tested a habit of eating the frog every morning for weeks.
The hospital studies are observational and about doctors choosing between patients. The authors controlled for a great deal, but a busy physician picking a simple case is not the same decision as a cook choosing between prep jobs.
Hard-first did not make people solve more in the lab; the gain was in how capable they felt. That matters (confidence affects whether people take on the next hard thing) but it is a different claim from "you'll get more done".
The time-of-day result is from one small study with mostly evening-type students; treat it as a hint, not a rule.

Sources

Habbert R., Schroeder J., "To build efficacy, eat the frog first: People misunderstand how the difficulty-ordering of tasks influences efficacy", Journal of Experimental Social Psychology 91:104032 (2020). Article
KC D.S., Staats B.R., Kouchaki M., Gino F., "Task selection and workload: a focus on completing easy tasks hurts performance", Management Science 66(10):4397-4416 (2020). Article
Ibanez M.R., Clark J.R., Huckman R.S., Staats B.R., "Discretionary task ordering: queue management in radiological services", Management Science 64(9):4389-4407 (2018). Article
Wieth M.B., Zacks R.T., "Time of day effects on problem solving: when the non-optimal is optimal", Thinking & Reasoning 17(4):387-401 (2011). Article
Quote Investigator, "Eat a live frog every morning, and nothing worse will happen to you the rest of the day" (2013). Article