Watch Tony Robbins…if you can afford his CDs etc buy a set, otherwise watch as many YouTube clips of him as you can.  Do this daily for maximum effect. Actually, any motivational speaker will do, I just like Robbins’ style.  Whenever I feel stuck in a rut or demotivated I find listening to him helps me to break out of my negative thought patterns.  
Hope this helps you.  Good luck 🙂