Every Sunday (usually), Spiritual Guidance will offer practical insight for priests of the holy profession. Your host is now Matt Low, the grand poobah of World of Matticus and a founder of PlusHeal, a new healing community for all restorative classes. For the next few weeks (unless it's something game breaking), Matt will do his best to guide you through the Priest leveling process!
By now, you'll have learned most of the spells you'll be using at end game. If you've been crafty, you might have been able to land instance runs to hone your abilities as a healer (or DPS if you're of the Shadow sort). I won't focus as much on spells here on out although I will list anything significant on the way to 60. Instead, I'll explore the various zones and instances that you can (and should) do.