Blathering Badly?

I'm in the early stages of marketing my books, "One Promise Too Many" and "A Matter of Faith". It takes up a lot of my time and energy being restrained and not overly blabbing about them on Facebook (but I'm pretty darn excited about it) or blogging each time about them (but I'm pretty darn excited about it) or shouting about them on Twitter (but I'm really darn excited about it). Well, actually, I think that's the purpose of Twitter. It's the ultimate social media where the primary purpose seems to be shouting about "me, me, me" and how clever I am, even if most of it is just bad banal blathering. Other sales avenues are slowly opening up. But the question remains...

...what do you do to ensure the rest of the world knows you have written the best book ever?