When using your bar for the first few times,pre-soap the bar with a little shampoo, let the shower water run over it as you squeeze and gently rub the bar to work up a lather. As you wash, resoap your "washcloth" by squeezing and rubbing the bar again.
 
Care
Daily use will keep the bar slightly damp so that the amount of time to lather the wool will be less.

Storage
Store your bar on a well drained soap dish.