How would you define this balance? How would you define the diference between mind & soul. I often blurr these two...
MindSpin
Balance is probably defined differently by different individuals. I don't know. But in my opinion, this is how you exercise each area:
Body: I've seen your pictures, so you don't need help there.
Mind: Learning new things, memorization, solving math problems, cross word puzzles, playing games that require thinking, etc. There seems to be a connection between physical exercise and healthy eating which benefits both, mind and body. Or maybe, lack of exercise and eating junk simply prevents your mind from developing or from functioning to its full potential.
Spirit(Soul): Praying, practicing selfless acts, forgiving, fasting while praying, depriving yourself of sleep for one night while praying. There seems to be a connection between spiritual growth and temporarily depriving your body of basic needs such as food and sleep, while replacing them with something spiritual, such as prayer.
Again, these are just personal opinions and things that I am still learning about.