Learn how Square Co-Founder Jim McKelvey successfully created and built Square, how (as a start-up) Square beat Amazon, and other tips he has for the 3 Takeaways audience. Jim shares why sometimes doing nothing is the best response.Square lets anyone with an iPhone, iPad, or Android mobile device and a bank account accept credit card payments. Jim McKelvey co-founded Square in 2009 with Jack Dorsey. Jim is a serial entrepreneur, inventor, philanthropist, artist, and author of The Innovation Stack: Building an Unbeatable Business One Crazy Idea at a Time.