[danjl]

Or a dozen. Or, better, a few dozen. Read "The Mom Test" to learn how to get useful information from your face to face discussions.

[dfex]

So much this! The Mom Test is a rare gem in a sea of startup advice books, but it's the only one I've come across that cuts through all the BS and focusses on the only important thing - finding a market for people who want your product.

Spoiler alert - you can't always do it sitting at home in your office chair.