As everyone says it happens to all of us. You can't look upon one day's result but look at the result's from the whole last month. If they are good, don't even think about that same days are not so green. (at least they are not red, right? :D )
I do something that calms down, which most of the time means for me going to the gym or for a run to clear my head from everything and then i come back to trading. You need to find smth that will do the same for you
Better to do one thing good at once than to do more things at once and do them badly. Love that tv show, they also made a tv series about it where also plays main character of this movie. Have you watched it?