According to me manually is the best option to check the keyword position.

I m using the google adword keyword tool. It is best and helpful keyword tool.

Google adwords tool is the best to research most relevant keywords to promote websites in search engines.

Google Adwords, Word Tracker and Keyword County are best tools to do Keyword research for your site.

Google Adwords is the keyword search tool. from here you can find and select the best suited keyword for you.

Here are some ways to get the keyword research for your business.
1. There are various tools available in search engine and you can get the help from them.
2. You can do it manually in Google search box and you can get lots of variations.
3. Also you can do the competitor research.