lots of answers for how to find something to do, few addressing an important choice of word from OP, "worthwhile". imo, adding this requirement in the beginning

lots of answers for how to find something to do, few addressing an important choice of word from OP, "worthwhile". imo, adding this requirement in the beginning of a process is quite destructive, because at each new idea you will be asking, "is this worthwhile?" and inevitably it won't be, because no idea starts that way, and you start the loop again. i am an artist, which has led me to try to understand creativity and idea-generation closely, and i have stumbled on two concepts that helped me to get going on stuff: “I‘ve forgotten who it was that said creation is memory. My own experiences and the various things I have read remain in my memory and become the basis upon which I create something new. I couldn’t do it out of nothing. For this reason, since the time I was a young man I have always kept a notebook handy when I read a book. I write down my reactions and what particularly moves me. I have stacks and stacks of these college notebooks, and when I go off to write a script, these are what I read. Somewhere they always provide me with a point of breakthrough. Even for single lines of dialogue I have taken hints from these notebooks. So what I want to say is, don’t read books while lying down in bed.” - Akira Kurosawa basically: do something else to trigger your creativity, get more inputs into your brain. and the second is that great ideas are not born, they are created. you start with something small, an inkling of something. it's dirty, unpolished, stupid even, but then you start to make something of it over time. it grows and you get feedback on it until one day it's become "worthwhile" - or not. then you cut your losses and try again, with more knowledge. anyway - i think you will find more great ideas if you get started and think less on whether it's worth your time.