I've learned some stuff about people from blogging all these years. Warning: Gross generalizations ahead. Proceed with caution.

• People read blogs at work.
• Because blogs are a diversion from work, they are looking for entertainment. Could be a fight in the comment section or just a good laugh.
• They are also looking for inspiration.
• People aren't doing that much work at the office.
• They don't read blogs much after 5:00 PM, during July and August, and over weekends.
• They prefer funny to serious posts, but a mix is best.
• Don't post about serious topics after 3:00 PM or on Fridays.
• Don't post anything that you hope will get wider attention in the blogosphere after 3:00 PM or on Fridays.
• People organize their RSS feeds on weekends, not during the week. 
• People like pictures.
• People don't like to read too many words.
• People love lists of movies.
• If you make a serious and depressing point in a blog post, you should follow it up with a ha-ha.
• People like a certain predictability to a blog. You can be a generalist with eclectic content, but you should be somewhat predictable about topics and extremely predictable about providing the content.
• People like to know who they're getting info from. If you don't have an important job at a think tank or a university or a newspaper, you need to divulge more personal information. Photos help.
• Women like political posts, but they like different topics than men.
• • Women like political posts about issues that are directly relevant to their lives.
  • Women don't like horserace stories as much as the guys do. BTW, most articles in the media are horserace stories, so the media hasn't figured that out yet. 
  • They prefer to read about political debates, rather than policy specifics or quantitative research.
  • If I write a post that I know will impress the boys (Charts! Numbers! Name dropping of academics!), it will often turn off the chicks. I've stopping caring and just write about whatever interests me.