Search Engine Optimization The Right way!

I learnt something really funny today that might already be known to most of them. When we are planning to host a commercial .Net website we try to put in every last thing we know about Search Engine Optimization(known better as SEO) into the design of the site; thinking that the Google Page Rank(PR) would go up by following all of them. But does that really help in increasing the PR? Having that in Mind, I am currently creating a website for a local automobile company that is in Mumbai and which specializes in low budget vehicles. The purpose of the page is to attract middle class buyers. I worked all my time to optimize the page for the one term “Low budget vehicle”, but now I feel I should be more specific.