There may not be an ‘answer’, and, that’s OK.
In fact, there probably isn’t.
It’s fluid. The answer can just be ‘whatever you are doing right now’.
Sure, you might not want to jump around too much. You probably do want to do one thing until it’s complete.
How will you know it’s complete? Well, you’ll know.
But, if that’s too zen for you, then I will say this:
You will have given it your all, you will feel like you have done the best possible job that you can do, and that to continue doing so every day no longer challenges or motivates you.
If you feel that, then you can try something else.