I like Shareasale for some of the smaller named merchants with bigger commissions. Linkshare has a couple of the really big beauty sites (Beauty.com and Sephora). Commissions are not quite as high on those, but they do have a wide variety of products.
Make sure that you join the new Aquarium on Shareasale so that you can tell the merchants what you are looking for and hopefully they will come looking for YOU.
