Do you ever ask yourself this question? It is an uncomfortable question.
Most of the time we ask ourselves what we should start doing. Immediately.
Most of the time we do stuff which takes a lot of energy and actually is not serving us, or the project we are working on. By starting something new next to that, it only becomes harder.
So, the saying: "kill your darlings" could be very fruitful to do. And hard also, because we do not like to kill our darlings. Because once they where THE new thing to do, the starters.
But by stop doing certain stuff, it also means you have more time to do the things you want to do. And maybe also something new.