Marketing yourself requires an abandon that’s hard to get right. Have you ever read the one about "sing like nobody’s listening" or "dance like nobody is watching?" Do you get my point? When I lived in Mexico City, an ex-brother-in-law taught me that the secret to getting the Mexican grito — that’s that whooping shout that goes with certain Mexican songs — right was a total lack of self consciousness. That’s true for marketing yourself.
Oh, he also recommended a good dose of tequila too, but that’s just for that grito analogy, not for marketing yourself.