Dude, you have been here for four days. No offense, but plenty of skilled LDers can go four days without a lucid. Lucid dreaming takes persistence.

Rhill, haven't seem you in a while, how have you been? Where did you hear that about not eating? I always eat before bed. Last night I had tons of popcorn and had an LD. I have not heard of that before. :/ if it something that helps though, I might get more lucids! Haha.

Well if your mantra is "I'm dreaming." Or "the next thing I see will be a dream." Then you have to believe those things. Put meaning behind each word, have a picture in your head of what that mantra is. It is really hard to explain. Read this:
Tutorial for Saying a Mantra - Lucid Dreaming - Dream Views