To be honest, I don't often come across a tip or piece of advice which is totally new and that I haven't heard, in some form, before.
But I did learn something totally new today in this US Sailing Team Sperry (USSTS) video about Brad Funk.
"I make sure that now I don't shave the hairs in my ears. So now they are super long because I can feel the wind shifts better. It's for real... I am going to let these suckers grow so I know when to tack."
The good bit starts at about 1:40.