Test your ideas with quick and cheap prototypes as early and as frequently as possible. You will get the maximum learning benefit out of the minimum effort.
Change the context of those lessons learned that you cannot share. And share the knowledge without betraying your friends.
Do not follow your intuition alone. You are not your users. Put yourself in their shoes. Design your success
A reflection on the best lessons learned by writing and publishing an article every day for 100 days.