Perhaps the most important aspect of optimizing your site for search engine exposure is knowing which keywords to optimize. The best way to choose keywords for your site is to think about what prospective customers would type in if they were looking for your product or service or your business.
Sometimes our creativity needs a little boost. Keyword tools like Wordtracker and the Google AdWords Keyword Tool can be that boost. These tools will help you to discover which search terms are really being user by the visitors.
Word Tracker http://www.wordtracker.com/
Adwords Keyword Tool https://adwords.google.com/select/KeywordToolExternal
Above that, it is always better to seek help from the Search engine marketing professionals who have already more experience in your industries. They will help you to give you exact solution for your needs instead of making trial and error research by our self..