In my experience, esp. in a startup you will never have enough people to do what you want to do. You need to
- Get really good at prioritization. Even if you assume that you are iterating rapidly, you still cannot iterate on lots of things, you need to pick a couple hypothesis well.
- Get good at asking the right questions. There is a lot of noise that you will have to sift through. If you spend your limited resources on the wrong part of the puzzle, you will not be able to make the right decisions.