I'm also utterly fed up with feeling like a beached whale, and want to try dieting. I was afraid to diet because I was so overwhelmingly ravenous at first, but now that my appetite is normal and dd is happy with solids, I'm going to have a stab at food-combining, because that worked well for me before I had children and it's also a very healthy way of eating.
Basically:
Don't eat animal protein with 'starches', eg, no potatos or root veg with your steak, but as much veg-that-grows-over-the-ground as you like; but you can pasta or potatoes with things like beans or lentils.
Fruit and drink must always be before or between meals, not with or after (they're supposed to move on out of the stomach faster than, say, meat).
Cut down on all fats except uncooked olive oil, so you can have as much proper salad dressing as you want.
And the real toughy is cut down on sugars - ie choc 'n' bickies (but then would have to do that with any diet!).
And I'm starting when we get back from holiday (the hotel chef is too good ).
Something that I have found very helpful is/was the 'rather less than 100 sit-ups a day club' thread. It seems to have faded away, so I'm going to try warming it up again. Going down a size on my tummy just from doing a few sit-ups was SO encouraging!
HTH