CRM
Add companies that you work with and track the people who you are interacting with.
Objectives
In this document you need to gather data and information about your segments to decide on which ones you should research next.
Gathering data about your segments
Market data
For example if you decided to segment your users based on their function you can use the following table to estimate your TAM.
# in the US based on function
# in the US based on title