Originality - Focus more on the originality of content and on a consistent basis. It is a habit you will need to cultivate.
A new blog should not add to the existing noise the blogosphere. Do something outstanding to get noticed.
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.