I make it abundantly clear that I work at my own pace and that thins will get done if/when they get done. This is mentioned in any first call, and repeated as often as necessary. This is a lifestyle business and it will stay that way.
Nothing ever needs to be done right now. I describe it as a balloon that slowly deflates. I never need to pump air into it at a specific time, as long as I do it regularly enough.
I optimise for low overhead and minimal maintenance. Whenever I create something, I consider the effort it will take to keep it updated for years. I have finite energy, so I take on a finite amount of obligations.