Yes.

Content and Keywords will also help your page ranking, which is much more important.

I'd read around a little on how to do it.

Once you have the big picture, start searching for the specifics.

Then ask the questions you need to ask.

Oh, and don't worry about page rank - that is of little concern to anyone.

Content and keywords will improve your page's ranking. However, it won't improve your Google PageRank. The only thing that can improve your PageRank is incoming links from pages with PageRank.

However, as Quadrille rightly says, don't worry too much about PageRank- 99% of the visitors to your site care about the quality of your pages, not the PageRank.