Here are some sites that I have found useful.

[chaos7]

A nice date base of the items in FFXIV. Very good for finding mob from the Hunting Journal, also has an awesome interactive map.
http://xivdb.com/ (http://xivdb.com/) : By the same people as wowhead

Nice website to check server status
FFXIV:ARR Server Status (http://arrstatus.com/)

Good website for general info
FFXIV ARR: The Ultimate Starters Guide (http://www.ffxivguild.com/ff14-the-ultimate-starters-guide-power-levelling/)

[Rostum]

A good wiki, by the same guys who did FFXIclopedia:
Gamer Escape's Final Fantasy XIV (FFXIV, FF14) wiki (http://ffxiv.gamerescape.com/wiki/Main_Page)

[Del Murder]

It's great that these are popping up already! I'll definitely use that starters guide.

[chaos7]

heres another
Botany in FFXIV:ARR Eorzea Reborn (http://eorzeareborn.com/botany-in-ffxivarr/)