Keep your eyes on Amazon Sales this December (2013). So far I have found a really great clothing sale. Coats, hats, gloves, sweaters, pajamas and swimwear are all 60% off. I really recommend checking out the swimwear. Winter is a good time to buy swimwear because it is cheap, and because you can buy the size you want to be and work towards it all winter. Once you get your swimsuit, hang it on the wall of your bedroom to remind you of your goal.
