“When you are blitzscaling your start-up, growth is so rapid and your organization is pushing its limits in so many ways that multiple things are always breaking. It’s tempting to fix these things with money, but you have to resist that temptation. Only spend money to fix things that are on the critical path to reach the next phase of scale; everything else can wait. As I described earlier, at PayPal we deliberately avoided spending money on customer service because we knew it wasn’t a critical path. The more you can keep juggling and defer spending, the more likely you’ll be able to raise money without the pressure of a short runway.”