Should you go out for a glass of wine with the ladies? Take that fishing weekend with the guys? Buy yourself that coffee and bag that you've always wanted? Get a massage?
The answer is maybe. Self-care is about recognizing that you are a creature made of mind (psychology), body, and spirit. That means that to care for yourself you must attend to each of these areas so that you can function to the best of your ability within your vocation.
Often we confuse self-care with treating ourself. Self-care doesn't always feel good; isn't always immediately enjoyable or easy. It is, however, what we need. So, maybe I don't need the latte, but actually need to exercise or take time to journal. Or, maybe I need that latte or a massage (because I've been neglecting my body). It depends. The point is, self-care is not just about doing what feels good or is enjoyable, but it's about doing what helps you finely tune the instrument (that's you!) that God is using to bring salt, light, and leaven to the world.