Take the plunge and write an article. Submit it to a bunch of publications. Think of something controversial and include some practical advice. Offer a memorable idea. And don’t forget to include a reference to gain ‘about the author’ credibility.
It’s not about creating an image of who you want to be, but by identifying the unique value that you bring.
Tip: Don’t blow your 15 minutes of fame all at once. If you get too much exposure you can become like stale bread!