Kate's absolutely right! Don't think of this as something you're going to do for a few weeks or months and then once you hit your goal weight, return to your old habits (and your old weight!)
Think of this as a lifestyle change, but make small changes/adjustment each week or month to help get you there. So many people start out with such keen enthusiasm and motivation and make sweeping changes and then it all crumbles a few weeks (or even days) later when it all seems too hard and they 'lapse' or fall back into old habits, maybe have a binge session and feel like a failure
If we all had strong will power all of the time, there'd be no addicts of any kind in the world and we'd all be super slim fit babes
So start with one small goal - maybe your goal is to walk/exercise for at least 30 mins a day, 5 days per week. Then tackle your liquid intake and start upping the water to two litres a day. Once you've got that down, then start looking at a small change you can make to your diet - cut out a coffee, switch your morning tea to something more healthy - whatever it is you need to do. Replace your old bad habits with some new good habits.
Having these small goals and small steps adds up to a lot of success
Just keep moving! And don't be lazy...
SW: 74.3kg - 1/1/09
CW: 71.1kg - 3/5/09