I do think being on-line and connecting with people can help an author's exposure. I think contests are great. I love reading people's blogs. I love seeing authors support other authors.
However, I really think we need to maintain perspective. I don't think we need to be here ALL the time, in hopes that our tweets, our blogs, our status updates, our comments, etc. etc might sell one. more. book. The world is so much bigger than the on-line world. Certainly this is one way to reach people, but really, isn't it just a drop in the bucket in the scheme of things? And life is short!
I just think it's important we remember the big picture. Or maybe I should say - it's important to ME that *I* remember the big picture.
"There's a whole life and world outside of publishing, and if you get too caught up in mirror-gazing, you can forget that. Then, when hard times in your writing/industry life come, it's hard to have perspective.
A book is a wonderful, miraculous thing. But in some sense, it's also just a book."