If somebody has to come find you to know how a thing gets done, then that thing only lives in your head. It works fine while you’re standing there. It stops working the day you’re out, the day you bring somebody new on, or the day the person who has been doing it for six years gives notice.
A standard operating procedure is a written answer to “how we do things here.” You write it once, and after that the answer doesn’t have to come out of your head every time somebody asks. This is the template I use, with a prompt under each field so you know what belongs there, and three finished examples so you can see what one looks like when it’s done.
Don’t sit down to write ten of these. Write the one for whatever repeat work you happen to be doing today, and let the set build over a year.
Where should I send it?