What if I told you they were relatively simple and easy, and didn't really involve much sacrifice on your part?
Fact is, there are. And what are those two things, you ask?
1) Cut out ALL trans fatty acids (trans fats, margarine, partially hydrogenated oils, etc.) from your diet.Truthfully, it's that simple. Read the list of ingredients of the foods you buy. If either of these two things are on the list, don't eat them. And over time, as you begin to figure out which foods usually contain these things, you'll be able to figure out which foods to avoid when you go out to a restaurant. (Hint: salad dressings and breads are often prominent offenders in both categories.)
2) Cut out ALL high fructose corn syrup (HFCS) from your diet.
The science on this is unassailable. And for advice like this you could pay hundreds of dollars to a diet plan or weight-loss guru. If you want to read well-written (popularized) articles on the topic, start here: Trans fats; HFCS.
You can research the science on the web if you choose. It's there. Both these products are the result of the corporatization of our food stream: they are cheaper to manufacture and store and, thus, add to the bottom lines of such entities as King Corn.
Perhaps the wisest dietary advice I ever heard was this adage from Micael Pollan: "Eat real food. Not too much. Mostly plants." Also, here.
I realize this post doesn't really fit into the usual WoW categories. It's just a little late winter food love from your host as you try to figure out how you're going to fit into that Spring Break bikini. Of course, if you can't live without your daily 'margarine float', well eat, drink, & be merry for tomorrow we die!