Ideas are tricky. Sometimes I have too many, sometimes I don't have any that I like. There's the keeping track. There's the disappointment when the idea doesn't turn out like planned. Lately I've noticed a few other things about ideas:
#1 They come to me when I think I'm not thinking. For me, ideas happen most often in the shower. We actually keep a notebook and pencil in the shower just for ideas, though I rarely use it. (why? see #2) Ideas happen when I'm doing dishes at the sink and on long car rides.
#2 Not every idea needs to be written down. If it's a good idea, I'll remember it. Or it'll come back around again. Too many ideas written down becomes a to do list. It begins to feel like work rather than inspiration.
#3 It helps to start with an idea but I don't feel like I have to stick with it. Change, iteration, etc. often makes the idea more interesting.
So the lesson here? I don't know. Do more dishes, take more showers? Maybe. Or maybe it's when I take a break, do those things rather than hopping on my phone or computer. Give my mind time to wander. Boredom isn't bad.
and a couple other sources that advocate for letting the mind wander: