I've been tracking a few sites lately and scanning their code to determine why they're number #1 on Google and other engines. It seems that a lot of #1 sites contain dynamic content on their landing page which changes daily, if not several times daily.
It doesn't seem like necessarily adhere to WC3 validation, meta tags, alt tags, IBLs, and all the other tips/tricks that SEO's talk about nonstop. In fact, they have very few keywords on the subject except for maybe an H1 tag at the top of the code.
I feel like new, fresh content on the landing page really boosts a site's importance in the rankings. To me it seems like the strongest factor out there at the moment. Any thoughts?