An errand can be simple in description and complicated in the hours available for it.

Difficulty and complication are not the same thing. Collecting a parcel is easy to describe and can still require a bus, a queue, an opening time that clashes with work and a document you forgot. The task is not hard; the fitting is. That gap explains why short lists stay undone and why people feel foolish about it.

When something small keeps sliding, plan the hour rather than the task: when exactly, getting there how, and what happens if it takes twice as long. If someone else’s errands are stuck, ask about their week before assuming anything about their willingness.