In my business life I deal with lots of entrepreneurs who take their projects very seriously, as well they should. But sometimes you have to take a break from the grunt work and have a little fun. I love reading and, what I call popcorn movies. Those movies that don't try to lecture you, enlighten you, or make you feel guilty. In other words, for the most part, they're not Indy movies or Oscar winners. What they are is fun.
Movies like "Indiana Jones," "Men in Black," "Under the Tucsun Sun," Enchanted," and most westerns.
Another way to take a quick break from drudgery is to find Free Online Games a few minutes spent playing can be refreshing. Some of these games can be addictive so monitor yourself, don't let a few minutes turn into a few hours.
You've heard it before but exercise can be uplifting. You don't have to change into sweats or a tank top and shorts. Get up, walk around the room, go down and up a flight of stairs, do some deep knee bends. Movement gets your blood flowing faster and that means not only will you get a boost of energy, you'll think more clearly.
What you don't want to do is get a hit of caffeine or sugar. it will give you boost but you'll crash about an hour later. Those energy drinks have the same effect, at least on me.
You'll have a better day if you have some fun.