Someone asks how long a task will take and I just pick a number out of the air, because honestly I have no clue. Then the day comes and I'm nowhere near done, and I have to walk back to them again. I'm starting to dread anyone asking me for a date.
More people experience this than they realize.
You have no feel for how long work takes, so your estimates are always wrong.
If this sounds familiar, the Library can help you find the bigger picture.