There is no virtue in volume, no benefit in bulk. The world has plenty of sentences already, so pause before you add to the pile. Most of us, when we write, march too quickly on to the next sentence. To write intelligibly is hard enough, so be sure you have done that first. Fix your sights on making one sane, sound, serviceable sentence. As a farmer must do, hold your nerve and resist the impulse to put your energies into cash crops with quick returns. Have the confidence to leave fields fallow, to wait patiently for the grain to grow and to bear with the dry seasons.