Found perfect keywords to promote, now what?

I love reading threads in BHW as they all prove to be extremely helpful. I have viewed hundreds of marketing videos thanks to BHW amazing sharers.

I had a questions that may seem a bit too simple but I would appreciate help regarding that matter.

I have done lots of keyword research, now I decided to focus on a couple of keywords with low competition yet high searches.

Of course I would love to focus my sales page say on these keywords (Most Long Tail). I understand that these keywords should be used in my adwords campaigns, backlinks, etc.

My question: How many times should I mention this keyword on my website? Is there any recommended density? Should I focus my keywords on all pages?

Any ideas to get the max out of these researched keywords would be truly appreciated.

I have a vast experience, yet I consider myself a newbie compared to you guys

Try to mention your keyword 1-2 times every 100 words.
Also check out linkwheel, it works!
http://www.blackhatworld.com/blackhat-seo/member-downloads/66543-get-linkwheel.html

I agree with the advice above and will add to use all of the synonyms for your keywords through out your article/blog/post,etc. Make sure that you sound natural as you sprinkle your keyword through out your post and have really good content (giving the reader a reason to come back).

Wow.. That was fast

I will be implementing lemonarian's Link wheel. It looks like one hell of a job to get it done, but from the reviews I read, it does magic. Thanks a million.

More tips are appreciated

Make sure your keywords + synonyms are not just in the text but also in your title, h1, h2, alt tags etc - mix it up though.

I usually have my keywords in the title, meta, meta description (doesnt really affect rankings), my h2 and then use the keywords in the text no more than about 3.5% - preferably in each paragraph and ideally in the first and last paragraph.

There is no hard and fast rule about kw density any more - synonyms and relevancy to the content is more important these days.

Seomoz have a pretty bad-ass list of things to focus on http://www.seomoz.org/article/search-ranking-factors