Pretty useful pointers from Mihaela Lica
http://www.pamil-visions.net/how-not-to-write-blogs/22034/
* Do not make it all about yourself. Not even on a corporate blog.
* Do not steal other people’s ideas without giving due credit.
* Do not make it hard or impossible for people to comment on your blog entries
and one from me
* Do make it useful and interesting!