Re: Any tips?
Personally, I didn't really give it up cold turkey myself. I just gradually lost interest in it. I still have some once in awhile, but I actually don't enjoy it as much as I used to. I'm not exactly sure why I lost interest in it, but I can think of a couple possibilities.
For one thing, I developed an obsession with nutrition and started studying it. I bought lots of books in the bookstores and checked a bunch out from the library. Reading about all the good things that certain foods do makes me crave them instead of junk food. In fact I just finished a book on yogurt and have begun a personal experiment of 300 grams of yogurt a day to see how it effects me. I'm having fun taste testing them at the same time. So everytime I go shopping, I can't resist the temptation to check out the yogurt department.
So I would suggest finding a good book. I recommend you start at the library, because if the book you start with is boring you can read a different one without feeling like you have to read the whole thing because you paid for it. If you turn into a nutrition maniac like I did, then you can look into what the bookstores have.
Another thing is that it's said that as you grow healthier, your body loses the cravings for sweets, alcohol, and junk food. I don't know if that's true, but it seems to apply to me. Eat a very well-balanced diet with a good balance of nutrients. (I lost my craving for junk food with a Japanese diet, but I would think any nutritious well-balanced diet would help.)
I don't see any reason why you need to rush yourself. Just try to improve your nutrition a little at a time, and maybe you'll just lose interest in junk food like I did.