Poker Strategies
After receiving pocket cards, you are immediately faced with a choice: play your cards and either raise or call the blinds, or fold.
Practice Matters
Sit out, take a bathroom break
Sit out, take a bathroom break and cool yourself down. If you have any doubt about your emotional state, don't return to the game. Remind yourself that texas hold'em poker is a lifelong game, one session or evening isn't going to determine any particular outcome. Write a favorite quote or saying that will bring you to a good state on a sticky note and keep it on your monitor, your hand, or a piece of paper you can pull out and read. Have a picture of your wife/girlfriend and/or children to remind you that you also want to play for them.
It will likely take some practice
It will likely take some practice but try a few different strategies until you find something that works best for you that you can go to when you need to. If you try one thing and it doesn't work, try another. If you can't get yourself to properly quit, then you may want to speak to a psychologist, or someone who specializes in gambling related psychology. Whatever you do though, don't ignore it and pretend like it will eventually get better, because it most likely won't. Be proactive and seek some solutions.