After reading some of the posts I thought I would add the following. Forget the numbers, and don't make your life dependant on what the scale says. A size 8 is only as good as what is happening on the inside of that person. Start listening to the health of your body!
Drink as much water as possible for YOUR body. Everyone is different, maybe some can only take 4 glasses while others will drink 12. Also, start drinking slowly. Try a half a glass at the top of every hour, then move up from there.
Instead of focussing on losing 20 pounds, why not change your lifestyle to include only the most nutritious foods. Look at the label of everything you buy. Stop purchasing anything processed, and that includes everything from microwave dinners to Doritos. If there are chemical names, put it back. Eat as natural and fresh as possible.
Next time your buying something pre-packaged, look at the ingredients. Usually, they are full of sugar, salt, and chemicals! Never mind that they usually contain some weird chemical that is 20 letters long! Also notice if you look at the nutritional analysis (especially on snack foods) they very rarely show the sodium percentage. The reason is, it's way too high!
Stay clear from anything made of white flour and sugar. The two best things you can buy for your kitchen are a breadmaker and a crockpot. This way you can make your own breads, pizza doughs, soups etc without chemicals etc. Canned soups are the worst for sodium content, MSG, and other chemicals.
If you focus on what you are actually letting into your body, this will have a large reaction to how you eat on a daily basis.My family has had severe medical problems since I was small. My father died of cancer, my mom almost died from a digestional disorder. I have read many medical journals and books on nutritian.
The best things you can do for yourself right now are totally to decrease your intake of white flour, sugar, sodium. Increase your daily cooking from natural products, increase your fiber and drink water! Also, throwing in some ground up flax seed will do wonders at the same time!
OK, sorry for the novel. I think I have given you a whole dollar, I'll stop now cause the exchange rate is just horrible on my end.