The Sales process

Jeremy had posted some thoughts in response to feedback I had given him. The particular area he had responded to was the "how much should you hear from a salesperson?". I'm curious, in general, from either the client or the agency side, are there particular tactics you think work well vs. those that keep someone from getting in the door?

On the positive side, I generally find the following helpful when forwarded: potential site enhancements, useful news stories and, blog discussions. What about you?