Energy is what drives us. It is what motivates us to do great things.
Hence, it is very important to protect the source of our energy. Filter out people. Only associate with people who add to your energy. Get rid of the ones that drain you.
Choose a career that gives you energy. Quit from the one that drains you.
Choose an environment that adds value to you. Leave an environment that saps your precious energy.
Read books that inspire.
Consume content that motivates you.
You get the gist! Guard your energy by all means.