I need help with my bicycle wheelies!?

I was bored to day and decided I should learn how to do a wheelie on a bicycle. Unfortunately, all the videos on youtube that instruct you how to one one aren't very good. My problem with doing a wheelie is that I can't get my front wheel off of the ground very much, mainly because I'm scared of pulling to farback and breaking my neck... that's also why I can't do back flips :3 Any help that could get me over my fear of breaking my neck, or that could help me get my tire higher off the ground would be great, thanks! (: