Macalua.com

Here’s a gem of a post courtesy of Half’s SEO Notebook.

Think of total PageRank X (sum of all inbound PageRank to your domain) split between Y number of pages. Roughly speaking, bigger page count = lower average PageRank per page (depending on your site structure). We know that a page with PageRank below minimum threshold “goes” supplemental. With excessively high page count, average falls too low, and you’ll end up with many pages in the supplemental index. By reducing the number of pages, you slightly increase average PageRank per url. That can result in several supp pages popping back into the main index.

This pretty much mirrors what Matt Cutts was saying all along at SMX:

If you got 60,000 pages, and you only got “this much” PageRank, and you divide it […he mumbles], some of them are going to be in the supplemental index. Given “this many people” who link to you, we’re willing to include “this many” pages in the main index.

So pretend you’re a mega-site dealing with a supplemental pages problem like Gov.ph and Yehey.com, what link building projects can you do to boost your total PageRank?

One thing you can do is to sponsor the Bayanihan SEO contest and watch your PageRank pie explode. The other thing you would want to do is to make sure you have one canonical version for each page. For maximum carnage, temporarily sacrifice pages that you don’t want to eating into your PageRank pie. When you have a bigger pie as a result of your link building initiatives, only then can you start adding them back.