downloading movies

Hi
I was wondering how I go about downloading movies.
what are the best sites to visit for downloading movies and what is the whole procedure for downloading?
I am only allowed to download 1GB a month so i am restricted to downloading. How to I download movies or compress them so that they are not like 700mb or more. Is there a way I could compress lets say a movie to 300mb or less.
All info appreciated

I don’t think I can tell you where to get movies because of site rules. I can tell you however that if you look for files that are in rmvb format you’ll find that they’re a lot smaller than avi, mp4 etc.