Hi there!
To be fair... there are plenty of diets out there that are not for the long-term, but it's often not a problem with the plan... it's a problem with the person. They are on a diet... and diets have end-dates, and quit-dates. I could probably find a few articles about what's wrong with every "diet" out there, but there are people on 3FC who have lost weight or are maintaining in many different ways.
I decided about a year ago that I was going to change my life. Forever. This meant a commitment through thick and thin, and down through maintenance.
I believe any course of action can have long-term results if we're willing to stick with it. If we're willing to accept that these changes have to be kept after. If we're willing to face down the hardships that we will (not may... WILL) come across.
Being totally committed doesn't mean that we don't make any mistakes... or don't make any poor choices. It means getting right back on and continuing in spite of those things.
I haven't lost 100 lbs yet. But I've lost 87. I hope the 13 lbs doesn't make that big of a difference about the experience that I've had so far.
I'm glad you've decided to join again

We'd LOVE to have you stick around the boards, post, and keep us updated.
May I ask what lead you to dropping off the plan the times before?