Birchbox, for $10 a month, they'll send you samples for you to try. If you fall in love with something, you can purchase the full-size item at their website.
You also can gain points when you purchase items and submit product reviews. I racked up enough points to purchase my husband a Birchbox Man.
March's box contained the following: Elite Therapeutics Rosemary Eucalyptus Body Cre'me ~ full-size $19
It's a 10 Miracle Leave-in Product ~ full-size $18
Jelly Pong Pong GLOW GETTER Highlighter ~ full-size $14
Liz Earle Cleanse & Polish Hot Cloth Cleanser ~ full-size $25.50
Roloxin Lift Revitalizing Facial Masque Treatment ~ Set of 10, $110.