Your content should be so brilliant that your audience can t help but share it, repin it, and bookmark it.
This goes without saying: you have to respond to questions.
Identify areas where your potential customers lack the necessary knowledge to make a good decision.
I personally love Google Keyword Planner as it provides tons of information on the volume of searches over time, different variations and relevant search queries, as well as how competitive specific keywords are.
Create a short questionnaire or a poll about what struggles they experience and what types of information they d find the most valuable.
Spend some time getting to know your audience and show your consideration of their needs, and you will reap amazing results that will translate into sales.