I'm a big fan of collecting free codes and redeeming them for prizes.
When my babies were in diapers I collected Pampers Gift to Grow codes found on wipes and diaper packages. While this was a slow ongoing process I found codes at my daycare center and also traded codes with couponers on forums online. Every once in a while Pampers offers up free codes and I post them here. If you are new to Pampers Gifts to Grow rewards program sign up here to get 100 free points. I still collect the codes now even though I don't have any kids in diapers. I'm hoping to collect enough for a free gift card.