Creative energy is a finite resource.
This is something to consider when choosing a side hustle or a job. If your job or side hustle both use the same creative resources then one might drain the other.
For example, Conor Friedersdorf, a writer for the Atlantic, wrote frequently on his blog before he landed his current gig at the Atlantic. He found that he was creatively drained from work and didn’t have the energy to write on his blog. Instead, he began to curate the best content he read and share it through a newsletter, an activity that was less creatively draining but also complimentary to his day job.