Don't run a business. Run a set of process.  ad hoc-ery can kill a business, and this can be really hard to understand, especially when you're a startup founder, because ultimately you are operating in a sea of uncertainty and often there is nothing that you can recognize as a replicable set of processes, but for your business to grow, what you need to do is identify, document, and then replicate a bunch of processes, whether that's sales, whether that's finance, whether that's operations, or whether that's marketing.