Our choice of the particular work we do depends on the whole context of our life and society and current needs, of course; but there is also just a general orientation that emerges out of almost any set of accumulated experiences of doing something useful, particularly as part of a coordinated exchange with others. And there is profound, life-giving value in even the seemingly mundane ways we apply our minds and direct our focused efforts toward purposeful ends that matter to us. This could be as complex as building an entire company, or it could be as simple as flipping burgers at a restaurant. It could also be volunteering at a shelter, if we make a serious and sustained project of it.
The antidote to burnout and the existential inquiry it brings seems to be doing things that don’t scale in pursuit of things that can’t scale. It becomes exciting not to see what you can do without limits, but to see what you can do with them.
Most innovation is a new wrapper for an old thing, meaning there's a fanbase already foraging for it. Your marketing job? Make sure the 'new' still 'looks like food' to this crowd. Use the same images, words, and ideas that resonate.