Write something useful for yours reader. Share a relevant piece of information, an event update or a hack that makes a task simpler.
Blogging community is a virtual arena. Express yourself by blogging as well as commenting on others' posts. It highlights you and increases traffic.
Post Ideas: At times you will just run out of ideas for post not sure what to do. use google and apps like Evernote to note down all that ticks in your mind. Something will surely turn into a new post.