So there are 3 main things to remember when optimizing your website:

1) Choose appropriate keywords:
This includes making sure you have those keywords in 3 different places; your site content, your Meta content, and your incoming links. Also don’t use your keywords too much, this is known as “stuffing”, but too little and Google won’t index your site properly.

2) Friendly URLs:
The following is BAD:
      mysite.com/index.php?car=jeep&type=wrangler

This is GOOD:
      mysite.com/jeep/wrangler

The difference is easy to see, one is easier to read for both humans and search engines. Also it is a good thing to be specific, so use your keywords in your URL where you can.

To accomplish this most people use Mod-Rewrite (Google it). Another alternative is to use a Content Management System for your website that will automatically create friendly URLs for you. I use PHPwcms but other good ones are Drupal and Mambo but I found mine at http://www.cmsmatrix.org/.

3) QUALITY incoming links to your site
This is the most important in my opinion and usually the hardest to pull off.

Basically the idea is Google will boost your site up on the rankings if you have alot of incoming links from sites similar to yours. This does not include link compilation sites and Google might penalize you for this. Usually the best thing to do is contact the administrators of similar sites and request an affiliate link in exchange for a service or a back link. Another good strategy is to put out press releases with your sites link in it.

Extra Knowledge:
So if you can’t tell, Google is the most popular search engine out there getting roughly 91 million searches per day. That’s a little less than half of all searches done daily. So it’s usually best practice to optimize your site for Google. If you want more information just contact me through facebook and I can give you some extra pointers.