Well, you can start by finding something that interests you. What kind of exercise are you doing? If you go in the exercise section of the forum-there is the workout video section if you do those, the weight lifting section if you enjoy that, and the general exercise section for conversations on walking, running, and just about every other exercise there is!
How old are you? There are sections for teens, 20 Somethings, 30 Somethings, and so on.
Do you have a large amount to lose? There is a specific section for those with 100+ pounds to lose, the 100 Club.
Do you have any health issues? There is a section on dieting with obstacles, that includes many ailments such as diabetes, PCOS, and more.
There are sections based on a certain diet plan if you are following a certain plan.
There is the Buddy Up! section if you want to find a diet buddy or two, and join forces with them and support one another.
Sit back and think about what your individual needs are, and then you will find the sections here at 3FC for you!