I forget to do things myself, often because I used to procrastinate as a child. So anymore if someone asks for me to do something, I end up forcing myself to do it right away just so I don't have to worry about it later. My mind tends to wander... so either that's from old age or ten year old bong resin stuck to my synapses. Yeah, it can be a pain to stop whatever you are currently doing to do something else, but at least it takes the heat off of you to get it done, and you free yourself up from having to do it later.
It's funny when someone asks you to do something, but then when you immediately make a move to get it done, they say "oh, you don't have to do it right now". Then why the hell did you ask me now to do it? If you wanted it done later, tell me later. My own mom was notorious for that stunt, and she still hasn't learned that I'll just do it now instead of waiting until later because I either forget or procrastibate until it's too late if I have a chance. Better off to cross it off your to-do list as soon as possible to avoid complications later.