If you need the same thing on a regular basis, find one reliable guy to provide it, and stick with them.
I buy almost all my clothes off one salesman at one store. He knows me by sight, knows my size, style shopping personality, etc. Unfortunately I moved recently so I haven't found my barber, mechanic, beer advisor, "guy with truck", or running shoe guys yet.
It's a real stress saver to know you can quickly and easily find competent people to help you.