Building confidence

Confidence is a fleeting thing. One day you have the next day you don't. Translate to golf, the front 9 it's there the back 9 it isn't.
What I've learned about confidence is that it's directly related to success. Success breeds confidence. The more successful you are at a given subject the more confident you become. Small successes such as hitting the ball over the water, not stubbing chips, hitting more shots solid are examples of small successes. You just have to keep building on them. Do your best to delete all the bad shots and holes. Build on the good ones.
The second part of the equation is to be as positive as you can be. Always attempt to find the good in your golf game. You must continue to accentuate the positive and do what you can to improve the negative. I always ask my students to enjoy their good shots. Hold your finish, watch the ball till it lands, remember what it sounds like. All these sensations are key to replicating a future shot.
In summary, remember that success breeds confidence. Do whatever you can to live off your positive memories.