You can randomly fling mud against the wall with no real purpose and expend a ton of energy, but not get anywhere.
Or you can create systems of how you do things, build schedules of when you do them, and do the research to learn why you must do certain things.
The second approach allows you to take those random bits of time you have and use them far more effectively than you otherwise would.
This applies to any business, sport, or other endeavors you undertake. Whether you’re creating art, compiling data for research, driving for Uber, baking cakes, or taking care of your kids.
Systems, schedules, and an understanding of why you're doing what you are doing will make you more effective at everything.