This is a great list. I would like to add one to the list, which, I think, is specially crucial during the intial phase of a startup: -> How to have a thick sk

This is a great list. I would like to add one to the list, which, I think, is specially crucial during the intial phase of a startup: -> How to have a thick skin to handle negativity and persevere. It's very important to be able to filter out the noise and stay focused.