Popular Topics: Stay updated with new topics or popular topics on other blogs you follow.
Grammar - Depending on the language you use, blogging just makes it imperative that you are reasonably good with your grammar skills and proficiency if not a master. Remember your audience is a mix of both; the ones who are experts and the ones who are not.
Grow your Blog Organically. Don't force/ask anyone to share, follow or comment on blog. Just focus on promotion.