Also, numerical operations / form filling while consuming liquid or holding a pet. It's surprising the number of times the ability to perform even a subset of tasks while not having both hands to dedicate has allowed me to maintain focus and interest instead of stopping dead and having to spool back up slowly.
> Because that's where it should always be.
I must admit, I have yet to figure out how to maintain this discipline while whiteboarding, let alone walking, or sleeping.
What line of work are you in? A cross between hardware and software?
If one is in pure software it seems extremely error-prone to be typing in numbers all the time manually.