There are numerous reasons one might have to resort to mostly self-study - lack of good teachers in the vicinity, lack of good players to interact with face to face, lack of time/money to attend classes etc. Provided one can come up with a workable self study plan, it is not easy to maintain the levels of motivation needed to reach high levels of expertise through every single practice session. How do you keep yourself motivated? Your answer will help if you're in this or a similar situation, but answers on general motivational techniques for musicians are also welcome.

I cannot add tags yet (would have added self-study, motivation if I could), so have opted for learning.