Get a list of keywords

Go to google and do a search for your main keyword

Scroll to the bottom of the SERP and copy the 10 "Searches related to" keywords given. Add to list.

Next, go to this Free Online Wonder Wheel Scraper:
http://dxjones.com/wonder/wheel.php

Enter the same keyword (or a similar one) and enter 2 levels.

Sort the list and remove any duplicates

Paste list into the Inz Tuel and run Inz.

Chose the keywords with the lowest competing pages.

Optional: Repeat the process with a few other related keywords.

After you have selected the keywords with the lowest competition, write pages and articles around these keywords, changing your "main" keyword from page to page and article to article, working as many of the keywords into content as possible for each page and/or article.

Try to use as many of the keywords as possible, focusing on those with the weakest competition.