What systems and routines help you stay organized as a solo--operator?

Look, when it's just you out there, you are the entire company. If you don't have a tight system, the business will absolutely run you over. You gotta stay organized and focused.  You have to alot your time properly.  I've been using a strict notebook, I don't rely on memory.  Every min of the working day has a strict purpose and you gotta do it repeatedly everyday. Organization and strict routine is the key to success if your the bottom line of your business.