Okay, since people keep wanting to know about how I make my binders I'll write about it here.
First things first, you can actually buy binders, or make some from other things if your sewing skills are less-than-fabulous. Remember, ACE = BAD. Also, here's a guide for that stuff.
Okay, if you have a sewing machine, or patience, I'll tell you how I do it. You might need to change the pattern around because this is designed for me (a skinny B-cup) and I don't know how well it'll work for other body types.