Teach what you learn
If you do not teach what you have learned, the knowledge dies with you and the people behind you have to pay tuition for it again.
An essay by Dustin Michael Drozd
Teaching is the rent paid by anyone who was taught. It is also, conveniently, the most effective way to actually keep what you learned.
You do not have to be a natural teacher. You only have to be willing to put what you know into words, in front of someone who does not know it yet, and accept the questions that come back.
In a trade, this looks like ride-alongs, jobsite walkthroughs, written checklists, short videos, and the patient repetition of the same explanation to whoever needs it next.
Done over years, it is how a company becomes a school and how a career becomes a contribution.