Service is good, as long there is no ego in it. Of course their are many types of services, just as physical, mental and spiritual.
Being helpful and kind to all is indeed a good service. But we should not engage so much in service to others, that we forget about doing service to our very own self.
We must also give time to ourselves through meditation and yoga, for our spiritual growth and maturity, and that is the best service we can give to our "Self".
Because, the more prepared one is, the better we can serve others.
So as said before, it is very good to serve others with the different possible services, but keeping in mind, that we also need to serve ourselves, with the techniques of Yoga and meditation, so to become spiritually matured.
As someone has beautifully said: we are spiritual beings, going through different range of energetic experiences or vibrations with material mixture.