For me the flow state has always come from a sensation of creative juices spawning ideas, a vision for an end result, and the deep focus that ensues in working towards that.

Such a cycle previously could take hours or days, resulting in long, deep flow states. But now I go through dozens such cycles a day.

So less of a single flow state, more so many short flow states. As for waiting, that’s when you can explore another idea in parallel. Double the flow states for me :)