There is a lot of difference between spending time and energy and resources on something you are passionate about, and spending the exact same amount of time and energy and resources on something you don’t care about.
In the first case, no matter how much you give, you will always find a bit more. You will feel recharged even after a full day of intense activity. In fact, the other stuff and the people in your life will most likely benefit from your positive attitude and adrenaline. Just because you are committed to something you love.
In the second case, the opposite is true. Even ten minutes of the activity will drain you. You will mostly complain, find issues with everything and everyone, and that attitude will spill to everything else, and everyone else, in your life.
So, the trick is this.
Do something for long enough to get committed and passionate about it, and reduce the distractions that make you feel miserable.
Easy. Not simple.