A Little Positive Thinking

Focus on your successes, remember them, ingrain them into you, don't let yourself forget them. A notebook is perfect for this!

Don't focus on your failures or defeats, learn the corrected action and focus on that.

Don't allow yourself to worry or fear, you are imagining yourself losing. This is like practicing/drilling a technique and having your opponent reverse you every time. It's the exact opposite of what you want to be instilling into your system. Instill success.

Mentally drill your techniques working, especially your newly invented ones, be sure to know they work, and reinforce them with mental drilling. Imagine the feel of the gi and the mats, the stink of your opponent, the timing of the movements, from start to finish.

Kill negative thoughts with a mantra, Mine his here.