OH, Yes. Frequently. And then there was the long message I printed out about doing something with someone but I had to remember to take along a plant, one that I hadn't dug up yet.
I do remember promising someone a rather unusual plant start I have, but no idea of whom, where s/he is or who s/he is and why that special plant. And when I wrote it, s/he might not even be in the state now, the paper looks old...I've been staring at that piece of paper for days now, stuck it on the fridge. I'll give myself another day and then toss it, and as soon as the garbage truck wheels down the street I'll remember who, but not what I was supposed to give them. Probably take the wrong plant and they won't even remember wanting it, but will be gracious and accept it.
That's happening rather often lately.