I got my Keywords,...Now where do I put then ?

I'm trying to give the best Keywords for my site, about the topic of my site.
Once I get my Keywords..... Where do I put then in my site?

I have a PHP/AJAX site (video sharing site)

Thanks

 

In the source of site...

 

Search for Google's seo guide (in google) and it will give you details about the places to put keywords in your pages. Basically, they suggest page title, page description, and of course somewhere in the text of the page.

 

My web site have around 118,000 videos with Titles, Keywords and Descriptions.
But I'm not getting the traffic from Google that I believe my site should have.

My site is a ready with Search Engine Optimization , what else can I do to get Quality Keywords?

Keywords should go under my main site topic ? and this Keywords should go under the Meta and Web Description?

Thanks

 

There is so much information about SEO, which I know very little about except the definition. For a beginner, what source would you recommend to start with for educating myself about what to do first, then second, . . .

 

thanks for all your informations