"I try to relax as much as I can. Playing this game, I'm not afraid to fail. I don't like it, and after I do it I don't want to talk about it, but I'm not afraid of it, so every time I'm in a situation I try to think about times I've been successful and I try to relax." Baseball player Derek Jeter
I don't know that this is the approach to use with mitzvos, but it might be with many of the secular parts of our lives like parnassah. Also, it's not the ideal mindset for a person who is overly lackadaisical. But many Yidden are so intense about their religious lives that they come on too strong in the other parts of their lives. For intense people, the approach can be helpful.