Six principles for making new things by Paul Graham. I especially like, to cite:

"""I like to find (a) simple solutions (b) to overlooked problems (c) that actually need to be solved, and (d) deliver them as informally as possible, (e)starting with a very crude version 1, then (f) iterating rapidly. """

and

"""And launch as soon as you can, so you start learning from users what you should have been making."""

Seems consistent with what we do at ARKI.