Benefits of Daydreaming!

Working memory is essentially the RAM of your brain; you use it for multitasking with active information, usually in the space of a few seconds.
Researchers asked participants to perform tasks so simple that their minds would wander. They checked in to see how often the participants started daydreaming. Afterward, researchers asked the subjects to remember information while doing math problems, and found that participants whose minds had wandered more had better working memory. The implication, according to the study's authors, seems to be that daydreaming is the application of extra resources -- a mind with a considerable store of working memory is more likely to wander when that store isn't being occupied with anything.