Stop eating wheat. You can still eat other carbs, but no wheat in any form.
There's nothing inherently evil about wheat itself, but refined flour does a pretty good number on your body. Re-read the "White Devil, White Devil" chapter of Your Fat to refresh your memory if you need to.
Not eating wheat will also make you cut a lot of foods from your diet that you probably shouldn't be eating anyway if you have issues with your fat. Pizza, burgers, and fried foods are going to be tough to find without wheat. Fast food will be almost impossible. If you cut these things out, your fat, sugar, and sodium consumption will inherently go down as well. All because you're just staying away from wheat.
Do this for a few months and the cake on your wedding day will be the best cake you ever put in your mouth.