How do I eat less junk if I have an uncontrollable sweet tooth?

I want to lose weight but I can't help but eat sugary stuff like fudge popsicles and peanut butter cookies, and recently I've started having cravings for SALTY foods...in fact I add a lot of salt to almost everything like omelettes, etc. I heard salt is just as bad as sugar. What can I do to stop craving sugary and salty foods?