Besides the main quest and side quests, I would recommend these links for info on leveling up.

This You Tube video explain using Fates to level up and the what ares you should be in in the description.
http://www.youtube.com/watch?v=UgqhsLK0qgc&feature=c4-overview&list=UUROchJRMGN35X6VIsMMbVjQ

More on Fate farming, more or less like the YouTube vid above.
http://accomp.me/ffxiv/fate-farming-guide/

List of levemate and where to find crafting quests!
http://www.ffxivguild.com/ff14-levequests-guide-levemetes/

Once you have reached level 50 this guide will give you a great idea on what to do next.
http://accomp.me/ffxiv/im-50-now-what/