One of the better search engine resources I’ve found is the YouTube channel of Matt Cutts, a Google employee who shares a ton of great knowledge about the way Google ranks websites. Matt gives in depth answers to a number of user submitted questions – many of which I have personally had over the past couple of years.
In addition to this, you should also be familiar with Google’s SEO Guidelines as well. This free pdf has a ton of information about SEO, which is perfect for someone who is beginning to develop websites.
There are a lot of great SEO resources out there, but you should at least come to the table with basic knowledge which can be gotten via these two free resources.