First things you want Rose Zulie to do quests until you hit level 30 before you start grinding. Once you hit level 30 then go to Shimmering Flats and do all the kill quests and grind on the basilisks around the small lake to the south of the race way until you hit wow power leveling 33-34.

If higher level help isn't available you still want to do the Scarlet Monastery quests but don't waste your time trying to find group after group after group to do it over and over again as this takes way too much time.

At level 34 your next stop will be Strangle-thorn Vale where you can grind on the Venture Co. Meteorologists at Lake Nazferiti.

Next stop is Raven-tusk Village in the Hinterlands. Grab all the kill quests and do them for really quick experience and you'll be level 52 before you know it. From level 52 you will want to travel to the Burning Steppes and grind on Fire-gut Ogres.

A large of good grinding spots exists here and is easy to find, so it would be pointless to list them all here. At level 58 grind at the Yeti Cave in Winter-spring until you hit level 60.