I feel like StarCraft and RTSes in general work really well in this scenario, because they occupy every brain cell available. Concentrating really hard on something non work related totally resets the brain.
And as a downside, I need to stop playing well before going to sleep. Trying to sleep right after a multi-hour game session is a surefire way for me to lie awake in bed for a couple of hours.
distances|8 years ago