If you’re looking to make your PageRank better, you have to play the whole page relevance game. RelevanceSpirit is what you need to use for this. Basically, you can have low PageRank but really good relevance.
If this is the case? It can actually shoot your PR rating up. Bad relevance will eventually get thrown out since your content doesn’t match your metatags or so on so forth. Thus, this takes care of improving your PR score by eliminating simple mistakes in relevance.