I've been using the "My Etsy Shop" app for Facebook to easily link FB users to my shop (best one I've tried thus far). This app has a feature that some don't like the ability to offer a discount when purchasing directly through the app, which entices visitors to check out your shop when they otherwise may not. The only downside was the app's icon didn't really grab attention (like most other's also), so after researching I found you can change the icon of almost any app tab on your Facebook Page (some don't allow).
This gave me the idea to use the app's "discount feature" to give visitors a much better reason to click. In Photoshop, I created a nice, bright new icon for "My Etsy Shop" and included my 15% discount in big letters under the app's name. Since doing so I've noticed about 2-3 times more Facebook to Etsy traffic than before.
If you're interested, you can check out the result on my FB page here:
https://www.facebook.com/NotchedArt(you can click "like" while you're there :)
Just click on the "My Etsy Shop" app and find the link on the right that lets you install, then just set it up however you wish.
To change the app's icon, follow this:
1. Open the admin panel for your Facebook Page
2. Find the Manage menu drop down, and select ‘Edit Page’
3. In the left menu, select Apps
4. Find the app that you want to change the icon for, and click ‘Edit Settings’ underneath the icon name and description.
5. Click ‘Change’ next to the Custom Tab Image option
6. Facebook will take you to a new screen, here you need to click ‘Change’ again next to the app icon.
7. Facebook will then take you through the process of uploading a new image.
The new icon image you upload has to be 111 pixels wide, by 74 pixels tall,
if you use a 15% discount like I did and want to use the icon I made just message me through Etsy and I'll send it to ya. (If you ask me here I might not see it for a while since I won't get notified).
Hope this helps, thanks for reading!