A friend of mine, Ed Leighton-Dick, challenged himself to blog this April, and extended the challenge to others. I think this is a great idea, and I'd urge you to take this on, no matter what your industry.
However I'll modify it.
If you haven't blogged before and you want to try this, do this in Word (or Notepad or somewhere else). I don't necessarily want you to publish these out for the world to see. Instead, I want you to send a weekly post, completed, to a friend. It can be a spouse, co-worker, college roommate, just someone else that can give you feedback.
Bonus points for sending it to two people.
A blog can really help showcase your knowledge and give your career a boost. Employers can learn about you, and if you're a good fit for their opening, they are more likely to call you. They can perform due diligence.
If you're good.
Being good at your job is hard. Being good at your job and good at communication is a step up, and writing can be a difficult way to showcase your skills. I get pieces all the time from professionals that know their jobs. They just don't express it well.
If you wish to give blogging a try, do it privately, but get feedback. Commit, make an effort, but do so in a controlled fashion.
Take the challenge, and publish. Publicly or not, give it a try. Get feedback and comments, and learn. Even if you put your post out for the world to see, send a link to friends and ask for feedback.
You won't regret it.