1) Thou Shalt Speak in Thine Own Voice.and continues in the expected direction...
(Everyone has a natural voice when they write. Some people are cranky, some are funny, some are strictly business. All voices can be ok, just make sure to use your own voice. If you try to sound like someone or something you're not, your readers will spot the fake.)
qv: The Ten Commandments of Blogging
I thought it would be useful to put down some of my thoughts on the subject and answer the questions I am asked most frequently.