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.
Tags: Use of relevant tags is important from the SEO perspective. It helps the search engine track your post based on the tags you use.
1 per day: If you have just started blogging, then writing consistently might take time. So set a target to have 1 post per day that is well researched.