Some of the most popular online selling venues for handmade products have rolled out some new features lately. Bit late to the game on some of these but in case you haven't seen them:

Etsy Rearrange Shops - I've been looking forward to this one for quite a while so I can balance the way my items are viewed on the pages.
Artfire Coupon Codes - Great for doing sales or discounts for repeat customers. All the other venues need to roll out something like this, it's a great idea.
Artfire Facebook Kiosk - Display your shop on Facebook, this is great if you do a lot of facebook marketing. You can use your Etsy mini and the My Stuff app to do similar on Facebook for Etsy but it's not as simple.
1000 Markets Redesign - Looking much nicer now.