Write something useful for yours reader. Share a relevant piece of information, an event update or a hack that makes a task simpler.
Add your personality - If you are writing on a particular topic, there are a number of people who will be writing on the same topic. So you need to add that specialty to your blog to make it look different and to allow your readers to take away something that the others are not offering.
Be clear about your goals for blogging. Maintaining a blog is laborious. And your goals will keep you motivate!