My wife is an event organizer, and in her early conferences, juggling a load of must-do items and decisions was a key pain-point as she kept many critical plates spinning. The stress of keeping all of it in her head at the same time filled up the cognitive capacity she had available to actually work on any of it.
We’ve all had people at work who’s answer to "When will that thing be done?" is always countered with "I’m working on it…" And, it never seems to be done. The most helpful people in taking on work are the least helpful in completing it.