Google has recently changed how you can use the Google Keyword Planner. Before, everyone who signed up could see the search volume for keywords. Now, it only shows estimates. There is a way to get around this. You need to create a Google Adwords campaign. The amount you spend doesn’t matter. After you do that, you will regain access to the search volume.
Having an influencer and content marketing strategy will help you develop backlinks to your website, but it is also important to actively be seeking ways to get people to link to you. Some of the best ways to do this are to write for a large publication, do industry interviews and recommend your powerful content to people who matter. You can also hire a public relations (PR) company or an SEO company that has a strong digital PR division to help you with this initiative.
I completely agree that defintion of a target audience isa great first step, but would ask if adding in competitors to the analysis (mentioned here as a later step) helps draw out who your target audience would be via comparisons, i.e. showing who you are an who you are not - would be very interested to hear opinions on how this tactic can be used within the overall step in coordination with targeted keyword discovery.