Talking to users is good advice that turns into a trap if you're not careful about which users and how you weight them. The failure mode I fell into: the people who reply fastest, join the calls, and send long feature emails are not a random sample. They're your most engaged power users, and their requests pull the product toward more depth for people who already love it, and away from the boring stuff that would help the next hundred people activate. A few things that helped me keep the sig...