Always give your best. That includes not being perfectionistic. And of course in relation to your energy level and skill. So keep it holistic.
You might think some things are more meaningful than others to do, so you do your best, but then not for things that seem to be less important. But instead of that think of it as developing yourself. And you are always there with you, doing it. In the long term it really pays off because you’ll improve all across the board. From spelling and vocabulary to cooking and cleaning. It’s okay to sometimes spend half an hour writing a reply to a single random person.
After all, who are you to judge what’s meaningful? You see people walking everywhere in a hurry, doing important things. But is it? And perhaps that single random person really appreciated your effort and it was meaningful in some way. And perhaps your ability to put half an hour into writing a comment pays off when you are communicating with someone at work. You just don’t really know. All you can do is focus on the things you are attracted to, and to do them well.