Do you have any advice for someone who's about to reach their goal and enter into maintenance?
First, don't freak out. Increasing your calories to a maintenance range will NOT make all the weight you lost come back. I see a lot of people on the Message Boards worrying about that. As I mentioned, I lost an additional 10 pounds after going into maintenance mode.
Second, realize that all the changes you made during your weight loss journey don't simply end. Yes, they adjust a little, and your calorie range increases a bit, but that's all. You still need to keep up the exercise, and the healthy, balanced eating. If you made the changes slowly, and turned them into routines you don't even think about anymore, it's a non-issue.