Hi, i am not going to offer a definition, because i can't claim i have it very clearly.... but here is some of the things i try to do with my body/mind/emotions. (left out spirit on purpose :P)
You can see them as tools, they help you do something, however, how can you maintain them?
Body:
Eat healthily. (learn what different foods have different benefits for your body)
Exercise. (team sports, weight lifting, yoga)
Some sort of sexual abstinence (save up on "sexual energy")
Mind:
Meditation. (sitting meditation, walking meditation, lots of kinds of meditations)
Never stop learning (reading books, listening to other people with open mind)
Emotions:
Keeping positive relationships (with parents, friends, classmates)
Repairing broken relationships (ex girlfriends, "ex" friends :P)
Forgiving (people who have done bad things to you, parents)
Now some activities give benefits to multiple areas, for example yoga works out your body, while being a meditative experience and at the end of it you feel good!
Well I hope this contributes to your understanding.
