Old Wife's Tales that seem to work for a lot of folk:

* Exercise
* Plenty of water

And IMHO, the most important thing is TIME. The faster you lose, the looser the skin. It's the one benefit of being a turtle!

And even if you are speeding down the scale, it will snap back depending on your age, genetics, how many times you've lost and gained, etc. It will just take time to see where you'll end up.

Your skin will keep getting tighter for years after you've reached your goal - as long as it's not a health hazard (like excess skin can be for some people), I think a lot of us jump the gun contemplating surgical removal.

Good luck!