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Boris Rieunierleft a comment
Don't build/test anything without having the user (potential or actual) as the cornerstone of your process. Meaning that you should have an opened communication channel with users at all time. If you don't have that, you should spend all your energy on finding ways to get it.
What's the most important lesson you've learned about building a successful product?
Aizhan AsanbaevaJoin the discussion