I love Market samurai, I have been using it for a long time now and it gets better and better.
I did a search on tyres and found that a term was being searched for 3k times a day. I managed to buy the exact keyword as a domain.
I then built a site around that keyword using drupal and phpbay taking me about 8hrs in total and then just plugging through doing seo and but for every sub page I used a keyword that was shown to me via Market Samurai (obviously relevent) I then wrote about 3 lines of content for each page above and below the phpbay listings. I have got half way through this. (internet connection has been desperate)
So today I check my stats from analytics google loves the site and whats more EPN is working a treat on it I have not put anything else on it.
The only thing as far as promotion is concearned is using Icansoft socialbot and thats it!!
Already in profit and getting a lot of traffic (for a new site) so things are looking good for the future with this one.
I wish I learnt about keyword research 10 years ago!!