Re-focusing at work.  Are you spending too much time on 1 project?  Is your brain having trouble focusing?  Try taking a break every hour or so.  Get up, go say hi to a friend, get yourself a glass of water – just take a minute.  If you cannot leave your desk, try playing 1 round of a computer game, something you enjoy but that requires some skill, such as mindsweep or sodoku.  Either way, taking that couple minutes out will provide fresh eyes and a refreshed brain which contribute to being less stressed and more productive.