Vocalpoint is one of my favorite sites to join. It is free and they send you full sized samples of products as well high value coupons. Often times I’ve been able to pair their coupons with sales to recieve free products.
If this is something you are interested in, apply here. You do not have to be a blogger to apply.
I’ve really enjoyed the surprises they send me in my mailbox, and it works for me!