Another Free Tip That Yields Better Sound!

I've worn specs since a kid, and thought about this also. I believe there's a sensory effect, removing the visual element (ie rig now blurry) and therefore the auditory becomes acute. More focus on ears, less on eyes. That's my theory anyhoo.

Related: all the ballcaps I see at audio shows. Hey blokes: take your hat off. We don't care you're bald. Nobody cares. A reflective ridge over your head and ears, at an audio show? Really?

yeh - but the bald head will reflect the highs too

you don't want a bald guy anywhere near you

Don't worry, a reflecting bald head has an even dispersion pattern similar to MBL speakers!
My tip? I use a Mucinex pill to inhibit mucus production. Works wonders draining sinus cavities. Really sharpens my hearing!
Can't tell you my best tip. It isn't legal in my state (yet).

Like every other true audiophile, I only wear well dampened eyeglasses.