The Law of Compensation states that whatever you put in, that is what you get out. In other words, the more you give, the more you effectively receive for your efforts, time and energy. As such, if you want to increase the quality and quantity of your rewards, then you must first increase the quality and quantity of your contribution.
Zig Ziglar once mentioned that:
You can have anything you want in life if you just help enough other people get what they want.
It all effectively comes down to giving more value. The more value you give, the greater returns you will eventually realize.