I've recently brought Pistol Squats back into my training. I think they are awesome. And very tiring.
"Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover."
"If you tell the truth, you don't have to remember anything."
"Never put off until tomorrow what you can do the day after tomorrow."