I think down-time is very important because we can overthink and become stressed. Do all the thinking you need to do when you're busy then chill out when you're off duty.
I like to watch videos of computer simulations during my down time, fun vid, battle simulation
I also have a down time playlist that I set to public,
It's also nice to have a smart phone full of solo card games like solitaire and free cell. Stay happy son and keep your chin up until Jesus returns.