In the beginning, a few times a month should suffice.
But you need to get exposure by getting your name on other, similar or related blogs. How do you do that?
1. Write guest posts
You write the excellent content, the other blog gives you exposure.
2. Invite people to interview you
Interviews are a great way to get exposure.
3. You can land major press mentions
Learn “the drafting technique,” by this guy on Social Triggers.
Derek Halpern has some great ideas!