Anything and everything, I would recommend browsing blogs to see what may inspire you. I keep my generally crafty with diy's, recipes, home organization ideas, outings and any other musings. Take a camera with you everywhere you go in case you are inspired. I often join link parties and share my personal projects. I rarely post about my shop and items, though I do, like today I posted 3 current treasuries as a simple colorful post. This past I weekend to a upick Lavender farm, made a craft and cookies and had lots of pics to share.
I find keeping it light and happy is best, to much woe is me posts will send me running, lots of pics helps a lot too, a great way to practice picture taking.
http://midnightcreations.blogspot.com/Like anything for me blogging is lots in short amount of time or nothing for weeks.
Good luck, I really enjoy blogging even if it is just to myself : )