Choosing skin products

Your attention to your users should be insanely great, to the point of being obsessive. It is not only the product that should be that great but especially the experience of being your user.

For most successful startups, over-engaging with early users is a necessary part of the feedback loo...

The best way to determine that their product is useful is to put it in front of the people most likely to use it. This can mean market testing, or it can mean asking people on your own team--ideally, those in roles it's designed for--to give it a go.

Treat your prototypes not as

1. Planning Poker: All participants use numbered playing cards and estimate the items. Voting is done anonymous and discussion is raised when there are large differences. Voting is repeated till the whole team reached consensus about the accurate estimation. Planning poker works well when you hav...