Gap after Form

I want to add a margin/padding to the bottom of this post section so it matches the other spacing of my design. I’d swear I accomplished this at one point but for the life of me know I cannot get that space there. it’s obviously a CSS thing that I am missing. If anyone can peek for me, I’s appreciate it.

http://www.supportmyhabit.com/2009/10/14/super-size-it/#respond