Give users what they actually want, not what they say they want.
In many cases, the more you try to compete, the less competitive you actually are.
Twitter, for all its good, is a hate amplifier.
Upgrade your user, not your product. Value is less about the stuff and more about the stuff the stuff enables. Don't build better cameras - build better photographers.
The secret to building great products is not creating awesome features, it's to make your users awesome.
Amazing, powerful, inspirational - those adjectives might make me sound like a fawning fan, but REWORK is that useful. Be prepared for a new feeling of clarity and motivation.