I have a preshot routine that i do on all my shots. I take a few practise swings, making sure to take the club away correctly and follow throught bringing my left hand (I'm a lefty) square to the target and to follow throught like i'm going to shake someones hand with my left hand. once i fell comfortable (about 3 swings) i will walk back behind my ball and visualize my shot... aim point, flight, landing. Basically I want to run through my head what i want to happen. I will then address my ball, take a deep breathe and hit.
I've been doing this for several years now and seems to work for me.