It's not enough to simply apply effort; you must work on the right thing. One hour solving the right problem beats ten hours on the wrong one. Spend time thinking about what to focus on.

When you make money, you tend to make life more comfortable so you’ve become distracted and you won’t be on your game anymore. 

Become obsessed about managing your energy rather than your time. Figure out things that give you energy and drain your energy.

The whole world tries to get you to the informed of their schedule rather than what works best for you. Find out what is unique to you what works for you and do that. Things that give u energy ( increased productivity)- workouts, sleep, Reading, solving problems. 

Most people waste their energy on decisions that barely matter. The most important thing is to stay focused on what matters. Most little things ultimately have no effect on an enterprise. It's the big deals - and the big decisions that do. Don't spend too much time on little things. The important choices and opportunities are the ones that move the dial.