Although the science isn't completely conclusive, recent research suggests that sleep can, in fact, improve problem solving.A 2018 study from the University of Bristol looked at a group's performance on mental tasks before and after taking a 90 minute nap. When compared with a group that stayed awake for the same amount of time, the nappers did markedly better on their repeated task, which indicated to the researchers that the brain did process some of that information as they slept. Keep in mind, though, that with only 16 participants, more studies are needed to be able to confidently generalize these specific results. More broadly, sleep has been widely proven to help with memory, learning, and judgement, which will all come in handy the next time you have to make a difficult decision.