Patience

If you are getting home from work stressed out you should do something to relax first, completely apart from poker. Watch a movie, play video games, go outside, whatever.

Whenever I start getting impatient I start playing very poorly just like you say. Its a form of tilt. I just stop playing. I do something else for awhile. If I have to stop for a day or so then thats what it has to be. Otherwise I lose $.