1) Sign up for intercom.io. It's genuinely the best customer support tool I've used.

2) Get the app and get a notification for every user's question. Try to answer them the second you see it.

3) Don't hire a dedicated customer support person. Stay close to your customers and build a relationship.

4) Watch this talk by Patrick Collison from Stripe: https://www.youtube.com/watch?v=nnllRegL_NI

5) Build out an FAQ

6) Make sure your customers are happy.