Although I am no where near my goal weight again, I believe that drinking alot of water has kept me from gaining all of my weight back.
I recently checked my old WW books and this coming Tuesday will be my 6th time going back to "start over". This is NOT because WW doesn't work, it's because I work the program for a while, then slip back into old habits!! But the one habit I've kept, is drinking my water.
I drink anywhere between 80 oz - 96 oz a day. Some days it's more, some less. During the summer, it's definitly more because I never leave home without a water bottle!!
Hope this helps and good luck!!