I've been noticing that just about everyone at my company wears
headphones while drafting, designing and modeling. Since its not easy
to see the little L and R on the earbuds, for each pair of headphones
I have, I loop a knot in the right earbud as close to the top as
That way, just by feel or visually, I can tell which is "Knot Right".
So, having that little knot in the right earbud saves time and your
Hope that helps.
For a companion tip, I take a razor blade and chip off a little
plastic on the right side of charging and sync cables. That's
especially helpful when trying to charge my iPhone in the dark.