Agree with the above, and I think the way I'd frame my main tip is that you have to be brutally honest with yourself about what you can and can't handle. Some people can handle artificial sweeteners, certain junk food in the house, etc; but if you can't, you can't. Figure out where you are on that spectrum.

I'm sort of like Nancy in that I can have non-sugar sweets with discretion. I can also go for a full-on treat IF it's out of the house and in a limited serving, like at someone else's house or a restaurant. Funny thing, though, once you're used to considering things like Greek yogurt + berries a nice dessert... the unhealthy crap really DOES lose its daily appeal. I should know; I work with it daily!

Okay, that was more than one tip, I guess, but...