TO be honest. I don't start with keyword research.
Firstly I start with something I want to write about. Then I do keyword research specifically looking for long tail keywords that I can rank reasonably easily for.
I have found over the past 6 years or so that writing from a keyword perspective first is counter productive. Find something interesting to write about something that you can write with passion and enthusiasm about and crafttyour keyword strategy around that. Your copy will be better, your visitors will actually read it and your rankings will increase because you've written for people rather than bots