Linux

A good refinement of this advice is to keep a Q&A sheet in your Dropbox or in Google Sheets or something, because writing down your answers that you discover can help you remember them, and can provide a backup plan in case you forget the answer and need it later, and can remind you to circle back to a question later when your toolkit is bigger.

Edit: also, it helps manage your backlog - you can make a rule like "if the unanswered count ever gets to ten, I'll sit down with an experienced user and try to clear them all"