A really quick way to change how you feel is to change your focus and a great way to change your focus is to ask yourself a great question. So next time something occurs to damage your confidence use one or all of the following high quality questions;
“What can I find that is good in this situation?
“What have I learned from this that will make me more successful next time?”
“How can I make this situation better?”
“What’s great about this problem?”
“How can I use this?”
Or maybe best of all “Am I enjoying this thought?” if the answer is a resounding “No” then change it to something more helpful (by the way you do know you have the power to do this don’t you? – it is your thought after all!)