The first year of freelancing teaches you things no guide or course can fully prepare you for. Some people charge too little and burn out, others take on every client without checking if it is a good fit, and some spend too long setting things up instead of actually finding work. There are so many places where things can go wrong early on, and most new freelancers only see the mistake clearly after it has already cost them. Looking back at when you started, what do you think was the worst mistake you made or saw others make?