Did you read Steve pavlina blog?, there are good advice there on how to motivate yourself.
Also, what i have used and has given me great results is EFT and TAT, visit the link at my sig, and i have recently been applying affirmations, wich is really a nice re-discovery for me because with the help of EFT the affirmation i am doing are really taking effect.
Read this, its really powerfull stuff, its just what you want because it is a great way to change without using will power:
Palace of Possibilities - Using EFT to achieve one's potential
Good luck.