All this week on Founder Stories, we've shown segments from Chris Dixon's interview with Stack Exchange CEO Joel Spolsky, who also writes the Joel on Software blog. In the final rapid-fire Q&A video above, Spolsky doles out some advice to other startup founders, primarily "have a co-founder" to share the load, "otherwise you'll go insane." And "make sure you figure out who wons what," he adds, and do that up front. As Dixon points out, the last thing you want is to have to explain to later investors why some guy named Frank who was only around for 3 weeks owns 30 percent of the company. ( Disclosure : Host Chris Dixon is an angel investor in Stack Exchange). Spolsky also explains why he admires Bill Gates more than Steve Jobs, why his favorite charity is DonorsChoose (crowdsourced funding FTW), why he finds it easier to hire people in New York City, and dishes on the group think in Silicon Valley.