As an actor, you generally want to see the other actor's face.
I kind of do it in my head, then I'll try pieces of it on stage and if it looks promising, I'll put it together.
Sometimes you forget you're famous. You wonder, Why is that person staring at me?
You should have a value system. You can win if you stick with your value system.
Every new routine I have ever written and performed probably occurred extemporaneously. Then after you have fleshed it out and tried it out in front of a number of audiences and it works, you put it down on paper.
I think you should be a child for as long as you can. I have been successful for 74 years being able to do that. Don't rush into adulthood, it isn't all that much fun.