I'll do my best, but the last couple lead up matches haven't been so good for me. I need to cut down the mental mistakes.
Stay focused in that you shoot with confidence and know how to solve the shooting problem. If you have a bad stage, don't dwell on what went wrong...pick something that went right and remember that. A bad stage is in the past, dwelling on it won't help you in the future. When shooting a stage...don't mentally tell yourself "don't do XYZ". Your mind doesn't understand "don't" and will focus on what you don't want it to do. "Don't hit the no-shoot"...results in your mind focusing its attention on the no-shoot...and guess what...you'll hit it. Mentally program how you want to shoot the stage...and then execute the program. Try to not watch less experiened shooters shoot the stage....if you see them have problems wih something and your not confident in your abilities, it can start the "gee...I hope I don't have problems with that too" ball rolling in your head. Also...don't watch the two shooters before you...what they do isn't going to help your plan at all. Develop a plan and stick with it.
And remember.......HAVE FUN. Thats why we do this!

Great advice Steve! This is such a good response, I split the topic and started a new thread on this. Funny thing is, last week, I made some mental mistakes on a stage and the guy shooting right after me did the same thing. He said to me afterwords, "I saw you do it, said I wouldn't do the same, then ended up making the same mistake." Thanks for the tip.