I found that the happiest moment in life was when I am able to be present on certain craft at certain moment.
Yes, that mean my mind isn’t divided into so many things.
I don’t meant that we should be so specialized that we avoided any contact with anything foreign.
To the contrary, we should be exposed to a completely different materials (preferably something that never been exposed to) to be creative.
But do it one at a time.
The rule here is to limit varieties you had in one day.
For example, for a day, I limited myself to one big project. Rest and diversion is allowed to unwind. But that should be on something ‘light’ like playing games or talking to a friend. Nothing like another-big-project. Only later when I finished, I allowed myself to work on another big project.
So be exposed to many things, but do it one at a time.
Does that could as multitasking?