Christine Tsai has worked with hundreds of entrepreneurs since founding 500 Startups eight years ago, giving her some unique insights into what leads to success. She said successful founders tend to have two traits: They listen to feedback, and they move quickly. To succeed, prospective entrepreneurs also have to be aware of the difficulty of the task ahead, she said. Christine Tsai has a lot of experience working with startups, and that has given her some pretty good insights into what makes entrepreneurs successful. Tsai is the cofounder of 500 Startups, the famed Silicon Valley venture firm and startup accelerator.