I'd better write this down

Coming out of the bathroom this morning something popped into my mind that needed getting/doing/something-like-that? So I headed down the hallway ten feet toward the bedroom.

By the time I got to the bedroom, I stopped, looked around and realized I'd forgotten what it was I had come to do or get. SO I turned around and head back out the hallway. When I got to the other end of the hallway, maybe twelve whole feet, I remembered!

So I turned around and went back, now energized in my purpose. But alas! at the other end of the hallway, I'd again forgotten what sent me to the bedroom; so back out again I headed to find something else to occupy my clearly mottled brain wiring.

"One more time for the gipper", I thought to myself, as upon reaching the doorway at the end of the hallway my original quest was clearer than ever. So back again I went, now annoyed that this silliness had gone on so.

Sure enough at the back end of the hallway, I drew yet another blank. I thought in my frustration, "this must be early Alzheimers", and headed back out, this time clear that even if I did remember upon gaining that end-of-the-hallway threshold, I was not coming back for anything!

I stopped at the end of the hallway to see if anything ticked. Nope. Nothing. A total blank. Now what was I doing before I thought of what I was wanted to do/get back in that dungeon?