I've moved up in the SE ranks and I've done "something" right, because this week has been on fire.
Back in May, another of my sites was doing really well. Then I made a minor little change to the lay out, and from that day forward, EVERYTHING COLLAPSED.
It still hasn't recovered, no matter what I did to get it back to how it was!
I'm so paranoid and suspicious and superstitious that I'm worried to make ANY changes to my other site that is now doing well.
I've just heard a lot of people say, "Gotta update, gotta post new content, all the time, all the time."
My sites don't have much content to begin with, one or two pages (but at least it's ORIGINAL content).
It's like, don't mess with it if ain't broke, you know? What is the consensus on this? Will Google start to demote your site if it notices it hasn't been updated with new content in a while?