Another Free Tip That Yields Better Sound!

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. 

Hats off to scott_w!
Also, closed eyes always yields better hearing. (Free tip #2).

Tom

Cup your hands behind your ears and realize we should have evolved much larger ears.

Like some of you here, I'v been wearing glasses since I was five years old. I'll use any excuse to take my glasses off, especially when there is a  serious listening session.

I don't know if the lens are responsible for reflecting sound but instead, relieving pressure on the bridge of my nose, allowing for the sinuses to settle down, and ease pressure in the ears, returning them to a more or less normal state.

All the best,
Nonoise