Broken links irritate visitors and can badly affect your ranking. Check and repair all such links on your blog.
Correct spelling and grammar is important.
Don't just type, talk to your audience. Blogging is way big a market on internet and people will like you if you do more than just providing information. Suggest, express, appreciate, criticize and have an opinion to build a relativity to a like minded audience. Make them feel that their visit to your blog matters to you.