At my old job, we used to have a Foosball table which we gave a heavy pounding every lunch, and occasionally when we had to work back late, late in the afternoon, or just before heading home.

We had a team of about 15 split up from junior to senior devs, the same of testers, our change controller and solution architect.

Yet for 45 minutes at lunch time, our status changed from your job description to how good you were on the table, whether one on one, or two vs two.

Unfortunately now with a new employer I don't have that complete change at lunch time. However, sitting down in a larger open room with a book is plenty to take my mind away from work for half an hour and send it elsewhere. Allows me to come back to the desk feeling a lot more refreshed and ready to start again.