So learn to express yourself.
Before you run, you walk. Before you walk, you crawl. Crawlers learn to walk through imitation, so start here: Malcolm Gladwell; Wonkette; Stop Blogging.
Meanwhile, learn the rules of effective writing. Buy these books: The Elements of Style; Eats(,) Shoots & Leaves.
Share your words with only the people who care to read them. And, for now, that's you (and only you). Write whatever you want. Try it using a pen and paper-- it forces slow, deliberate thought.
Don't erase. Write something and mean it.
Find a good editor to critique your work. Hand her a red pen and instruct her to be ruthless. Read her comments. Read her comments again. Ask questions. Rewrite, rinse, repeat.
Join a micro-blogging website like Twitter. Learn how it works. Follow some people who share your interests.
Get to the point. Use only the space provided. If it's worth saying, 140 characters is more than sufficient.
The previous sentence contains only 51 characters. The previous paragraph, 108. This paragraph, 114. Get the idea?
This blog employs laconic styling.
This is our voice. Find your own.
Send it in to 'stopblogging' at GMail.