Hello losthawk: I don't know of any particular tips for not backing out of interviews. Maybe take someone along who will not let you back out. (They can wait in the car, at a nearby coffee shop or café, etc.) Perhaps also plan a reward for yourself for going. If you go to your interview... you get "X".

It's good to go to as many interviews as possible. It's by practicing your interviewing skills in real interview situations that you'll become more comfortable with the process. Most interviewers will ask the same questions. And so, over time, you can practice answering these common questions & develop effective answers. If, by some chance, someone offers you a job you just don't want, you can always turn it down.