Also, one other important thing which will stop you from giving up.

Even if you fail a lucid attempt (DILD or whatever), try to remember to awesome world of normal dreams. Lucids are awesome but normal dreams are alright as well!

And one thing which I have noticed in many is the fact that when they start they get all excited and look up on all sorts of techniques. In one day they pretty much burn themselves out with RCs and affirmations. Then they probably fail an LD that night and lose motivation the next day and the next until they give up. So try to spread all your efforts out over a few days to avoid burning out.