If you like..
* ice cream, find a healthier version (I like Dreyer's double churned no sugar added)
* fried chicken, find a baked version that you like
* high salt & fat snacks, try salted dry roasted edamame
There are always better options!
milkshakes - try Hungry Girl's (cookbook) smoothies - WOW
starches - try baked sweet potatoes with just a little salt
high fat milk - wean yourself off of it by blending one 1/2 gallon with 1/2 gallon 2%, then the next time, straight 2%. When that tastes fine, do the same with 2% and 1%, and so on