I use the broad tip to color my Hug Snug seam binding, to make my own twine and to color the labels I use on the back of my cards. (I designed my own logo and print it on tiny return address labels instead of stamping on the backs of my cards. Saves me a lot of time!)
Caution: You are entering an artistic zone. This is not clutter - this is creating. These are not pajamas - it's my work uniform.