Get rid of your clothes as they get too big.  This gets rid of the safety net of having clothes if you gain the weight back.  When you lose weight you have to have the mind set that you will not gain it back.  If you don't, you are allowing opportunities/excuses to go back to your old life-style.  I have kept one pair of jeans that I wore before losing weight,  and put them on every once in awhile for motivation.