For keyword analysis check out your keyword competition and searches.Choose keyword having more searches and less competition.Use the given below tool for keyword search http://www.keyworddiscovery.com/search.html
There are so many tools available online for this .I suggest keyword elite as it is one of the best keyword analysis tool.
check out your keyword competition and searches density with "http://www.digitalpoint.com/tools/suggestion/" and choose the keywords with more competition..