Important topics and Leo Babauta at the Zen Habits blog has a bunch of ideas about Goals and Motivation.
Worth reading to see if they make sense to you and more importantly can you make use of them.
Two things that have worked for me are:
1. to visualize the goal being achieved and define what that success would be.
2. just try despite all the naysayers and see what results you get by taking it one step at a time.