Firstly, get into the habit of writing down your dreams when you first wake up.This will help your mind think that they are important, and you will remember your dreams alot more.

Secondly, each night tell yourself aloud that your going to remember your dreams when you wake up.Say that about 10 times aloud to yourself before you fall asleep.This will get it set in your mind that you want to remember them, so it will increase your chances.

Try those and see how much that helps (it should help quite a bit actually).