1. blogger.com has a very friendly interface and the new one is even friendlier, also, blogger's design tool lets you make a pretty nifty looking blog even if you do not have the experience with html, css and all of that seemingly scary stuff
2. let your personality shine through it
3. try to include pictures, the Internet had never been as visual as now
4. have fun and be varied with your topics, but at the same time, keeping a common vibe (which if number 2 applies, there'd be no problem at all with that)
5. lately, I've been planning most of my posts ahead, which allows me to post more often, which is my blog-goal these days
6. if it is a blog related to your etsy-store, and you have a strong branding, reflect it there too (and include the etsy-mini of your shop in the blog!)
best of luck and share your blog with us when you make it!
mine is:
http://lemondear.blogspot.com