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).