Managing Site Growth?

markmcb asks: "I started a web site about two years ago. When it began it was simple. The code was 75% hacked, and administration was easy. However, the times they are a changin'. Now I get hundreds of thousands of hits and have a steady flow of new users. I'm noticing an ever-increasing gap in terms of my site's popularity and its technological progression. Specifically, I have all sorts of 'XYZ for Beginners' books that are no longer of use to me. Even the so-called non-beginner publications seem to only scratch the surface of running a site. As problems get more complex, trying to Google every situation/issue I have with site administration has become less useful as well. I'm finding things like writing optimal code, configuring servers for high-volume, balancing ad income vs. server costs, and maximizing the efficiency from my moderation team have all become issues and that aren't addressed most books. What is the best way for a low-income, non-professional, but enthusiastic web designer/administrator like myself to manage site growth as it leaves the realm of just-for-fun?"