The pen is as much a part of the hand as your thumb or your palm. Granted the pen might change size, shape, and color a bit more often than other parts of your hand, it still follows some of the same tendencies. Like exercise.
If you want to have a strong hand, say for example you want to have a fit thumb, you have to use it to keep it in shape. So you decide to thumb wrestle everyone you encounter. Your mom. Your boss. Your girlfriend. The guy you buy your morning coffee and newspaper from. If you want to keep your pen in shape, you’ve got to do the same thing. While you’re pen isn’t a muscle, it’ll still grow and improve the more you use and especially if you apply it to things you normally wouldn’t.
My grandmother calls my mother about (and this isn’t an exaggeration) 4-8 times a day to tell her very random things involving the family in a very scatterbrained way. I told her today that instead of calling 8 times a day, to write down what she wants to say, exactly how she would say them, and email them to me. Besides cutting down the frenzied phone calls my mom gets, it should make for some very original material that is more random then I could ever possibly come up with. A perfectly unusual way to keep my pen in shape.
Seems that the pen is more a part of your brain than a part of your hand.