one more small tip:
Depending on how you tear it, you can have just a little white paper showing or lots. If you want less (like the dark blue paper) tear it right down the middle as you tear it towards you. If you want more white showing (like the light blue paper) tear it just a little to the right or left as you are pulling it towards you.
Practice a little on scraps before you do this so then you can get the hang of it.
Also, you can wet your paper for a more precise tearing area. Just dab a q-tip in water and draw where you want to rip it, then when you rip it, it stays very close to the line you've drawn in water with the q-tip.
good luck!