I bound my belly with the last birth and will do it again after this birth. It really did help. By 30 days after the birth my waist was back to normal, with the exception of a bit of skin that needed to go back to normal.
The only thing I am going to do differently is get the two sizes. I think if I had sized down and done it longer, that extra skin would have been normal by 6 weeks. It also really helped my posture and made me feel better about going out of the house. I think I started 4-5 days after birth and will do the same this time.
http://babooshbaby.com/tauts.html
This is what I used, but I know there are more. I think one of the Kardashians is the spokesperson for one now.