i'm a big fan of post its too... multi colored...

whoo hooo (Majo i love your desk for that!

)
agree on can Derrick copy the list. But i'd think it best if he could fold it up and just keep it in his pocket to refer to rather than paste it elsewhere. the other possibility is post-its where each task is on a different one. and he can stick them to each other and then to a surface near him as he goes from task to task.
agree on the bathroom issue
-- is it medical? if so dx and treat.
-- is it psycho-social? if so inquire as to specifics and approach accordingly
-- is he having some sort of "spell" that could be a sz or a panic attack... if he doesn't recognize what is going on the bathroom may seem like the safest place to go.
-- other - dialog with him until it is clear the reason for the bathroom time esp as you say it is not just at work.
basically i agree with the others 100%. now i'm wondering why ihad to type it.
it was the post-its i think. heheh. i just finished making post-its for mom and me for what we each have to do tomorrwo for my meds...
~ waves ~ whose gonna be dreamin post its tonight.