#1 - Define / Eliminate any failure points.
What are the scenarios, temptations, or distractions that will prevent you from reaching your goals? If you can identify these things ahead of time, you can then change your methods (or create contingencies) in order to avoid/minimize these failure points. Less failure points = more success.
#2 - What would it look like if it were easy?
I usually find that the more complex something is in my life, the more likely I am to have issues down the road. In the same way, if you can keep your goals SIMPLE, you'll be more likely to achieve them. Working backwards, ask yourself what you would do if achieving your goal was EASY, then use the answer to create an effective method.