That's what checklists are made for.

No idea, without writing it down it's gone.

Put a sticker that says "Push!" on the door.

Ask them for the new address instead of directions. Or maybe they would point it on your Maps app.

Make a list of key points, one for every 5-10 minutes or so. Memorize the list if you don't want to keep it in front of you, it's only 5 to 7 items.

Sing it out loud a few hundred times.

Find something to occupy your mind when you are falling asleep, the work thoughts will pop up again in the morning if they are any good. I just pick a small piece of an interesting problem or calculation and try to do it in my head until I lose my train of thought, which is an indication that I am about 5 min from falling asleep.

Go through the part of a Dale Carnegie training course that teaches you how to memorize names and faces for future networking. The rest of the course is good, too.

I would never ever attempt anything like that. But Scott Young has a few great suggestions. His mailing list is well worth subscribing to.