Try a match game to keep the mind in focus
Every once in a while it helps to play games to keep from being stressed out. A simple game of match play is a good way to stay focus and keep the mind sharp.
The visualchallenge.com has a simple match game - 16 cards. To test your skills. The website can track your progress and you can see if you can beat your previous game. It's a lot of fun and a good way to break down some downtime.
If your really good you can try the "expert mode" with 60 cards. I would recommend starting slow.