Enhancements - Exercise and Lifestyle
These are hacks that fall somewhat outside of what we normally think of as grinding. These are things that do not require foreign objects or genetics. That being said hacking is coming to understand a system and using it differently to produce results that you find desirable
Nutrition and Exercise
Meditation and Memory Palaces
Various hacks on productivity and how to get more done with less time.
WORK IN PROGRESS
Make your goals quantifiable. It's easier to measure the success of a goal such as "wash 10 dishes before I go to work" than "wash the dishes".