Originally Posted by fubek
Power to you! I have lost weight in the past, though not 100 pounds. My advice: consult a doctor and get a regular checkup; eat far less; eat far healthier; exercise way more; if you're about to slip back into unhealthy habits, don't. The "hacker's diet" helped me; search the internet for the free ebook. It explains rationally what you have to do. Good luck!
I checked out the wikipedia entry on it and then the guys site. Fairly nice. He provides tools he made. No advertisements and he isn't trying to sell anything. He just put up the site to tell about his experience .