Your mood, or rather and more accurately, your frame of mind is super essential to manage before deciding and of course during when you play poker. Anything that is going to distract from total 100% concentration needs to be removed from your mind and your surroundings. Any disagreement, worry, concern, etc that your mind is going to wander towards while playing and specifically anything that you are angry about WILL affect how you play.
Generally, if you are not in the correct frame of mind, you will not give 100% concentration and are more likely to make chancy decisions. Those are decisions where you know they are wrong, an probably super crazy
odds, but you take them anyway. The chances are (of course because the odds are wildly against you) you will lose that bet. If you do win, dont see it as a sign of how to play...you just got lucky and hit the one chance in the odds provided. (i.e. in a bet of 100-1 you have one chance as against 100.)
So! Clear your mind and be happy. If you cant....dont play poker...or any bet game.
Its that easy!
Best wishes
BB