Here is something I have to work on all the time. I feel like eating...constantly. I'm not necessarily hungry, but I just feel like chewing on something. I don't know if it's because I'm bored or what, but I'm constantly putting something in my face.
So this is what we need to think about. No more snacking. Rather, have A snack in between meals. Be conscious of the choice of snack that you are eating. Be aware of if you are actually hungry or not. Don't just snack all the time, choose A snack to eat to hold you over until the next meal. And try to make it a good one. :)

Make a list, before going grocery shopping, of some healthy snack ideas. Google some ideas if you are having a hard time thinking of some. And don't buy snacking foods when you go. Just snack foods. Make sense? :)
Also, if it doesn't taste good, don't eat it. As in, if that popcorn you are eating is sort of stale, don't eat it! Or if you like cookies, but don't particularly love the cookies sitting on your cupboard, don't eat them!
Be conscious.