Its not just good content that matters, presentation of post is very important too. Have attractive pictures, fonts etc to hook the readers.
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.
Forums are good way to drive traffic if you are regularly posting something.