Cabinets tell the truth
A tidy comms cabinet is rarely just cosmetic. It usually means someone has thought about failure points, spare capacity, labelling and what happens when the wrong thing is unplugged in a hurry.
Field notes
Observations from making business systems feel steadier.
Good technical environments tend to share a few qualities: clear naming, patient setup, decent airflow, verified backups and an unusual respect for small details that everyone else has learned to walk around.
Spaces have temperaments
Some offices swallow Wi-Fi at the far end, some shops inherit electrical quirks, and some rooms never settle until the clutter is cleared, the access point is moved and one or two quieter measures are put in place without excessive discussion.
Documentation is a kindness
Future you, future staff and future suppliers should be able to understand what was done and why. Even the uncommon fixes deserve a decent note, if only so nobody repeats them by accident.