Well, to be honest, the first thing you should do is flush the pills and shake down the toliet. These are not things you need to lose weight. You can do this. Now, I'm not saying it will be easy and I definately will tell you that it isn't fast. Let's start with something simple. Take a bit to read several of the stickied thread that contains information as well as read some of the diaries of members to see that yes, you can do this. Your mental state is the foundation you need to start on. You seem ready so let's move to part two.
Start with a food diary, we have a whole section for this. In it, record everything you eat for a week. Don't skimp, even the little piece of cheese you nibbled on or that handful of M&Ms. This is important cause this is how you can look back and find the changes that needs to be made. I would also add how you are feeling when you are wanting to eat as emotional eating is a high reason for weight gain.
Also, start reading. Not sites trying to sell you scam weight loss plans but actual sites that can teach you what a proper portion is. Use sites like fitday.com to see the calories in things you normally eat. It is knowledge that will be your key to keeping the weight you do lose off.