The most powerful thing you can do for everything in your life is emotional. Some things may be more powerful, but they are not for everything in your life. But, if you want to do one thing to improve everything in your life, then it will be to have emotionally good vibes—always.
We don’t need loads of hyperactive energy or so-called “positivity”; just make sure your emotions net a positive at all times. When a thought derails you, abandon it no matter what! Positive emotions mean you are always “more happy”. Then, like airplanes lift, you will always rise.