I am documenting my weight loss with photos. Every month I take a picture of myself so that when I reach my goal I can fan the pictures together to see my progress.
Every morning I send an email to a friend of mine telling her how I did the previous day: the food I ate, if I exercised, etc. This is a good way to start my day and get me on track, reminding me of my goals. It also helps me see where I failed the previous day and what areas I can do better in.
I joined a gym for a discount because they want to use me to advertise! Now I'm accountable to a gym for my weight loss and exercise! I have to go a minimum of three times a week to stay in the contract. Talk about motivation!