Mainstream poet? Seems like a paradox to me.
It takes slamming.

simple answer. Slamming, and creating a media packet. You need photos of yourself (professional headshots), video of your performances, audios professionally mixed, stuff like that.
There really is no "mainstream" poetry scene. It's still rather underground. Def Jam was going to come out with a poetry label (at least I think I remember Shihan saying that last I saw him) but the market really isn't there. Ever notice that the Def Poetry show is all reruns of last season? (That shit is getting on my nerves).
But you can have a career and make some decent money in the poetry
underground. I say this because the best of the best: Saul Williams, Shihan, Sekou, Mike Connell, Medusa -- I mean the best ever -- still sell their own CD's out their trunks
literally. They aren't signed, they're not even making the kind of money or pushing the kind of sales you see from like, a Sage Francis, Eyedea, Aesop, or any other lackluster selling phenomenal rap act.
As far as books? You will not sell a book. Making one is just for the sake of being published and saying you are. I plan on making one, but not to see any figures because I know I won't. I plan on doing it because I
have to as per dictate of my soul.
If I do it for any reason, I'll end up with the notorious fame of say,
Edgar Allen Poe.