Keep in mind, there are very few people (outside yourself and maybe your mom) who care all that much about the details of your life. I can think of three exceptions to the “don’t blog about your life” rule:

1. If you’re a genuine real-life celebrity (not just famous in your own mind ), then you likely have fans who will be interested in details of your everyday life… at least for as long as you maintain your celebrity status. (Eventually, though, even they will probably get tired of reading. Keep it interesting and upbeat and they’ll stick around longer. Nobody wants to read every single day about your adventures in brushing your teeth or how annoying your significant other is, no matter how famous you are.)
2. If your “everyday” life consists of things like climbing Mt. Everest, reporting the news from a war zone or working behind the scenes in Buckingham Palace. In this case, the details of your life are probably interesting enough to keep people coming back. Just be careful about the depth and content of the details you reveal so you don’t spill any state secrets or get your celebrity bosses (and their lawyers) riled up at you.
3. If you’re a world-class storyteller like Erma Bombeck or Bill Cosby and can turn a simple story of arguing with your spouse, cleaning the bathroom, or cooking supper into an entertaining adventure saga. (Note: it’s a lot tougher than it looks to pull this off well.)
   

Robin’s exactly right: if you’re going to constantly indulge in pity-parties over how your life stinks, spend your time bragging about how great your life is, or simply bore people to death with excruciating details of your day, NOBODY will want to read it for long, no matter who you are or what you do with your life.