Be aware:
For regular users there's just not many reasons to root anymore. Android and hardware have come a long way. I haven't bothered to root my daily driver in a long time and usually recommend against it. Ask yourself what you need to do that actually requires root or if you just want to play with the phone. For most users it's probably the latter.
No offense to hard-working developers, but custom ROMs do vary some in terms of quality, stability, functionality and features. Rooting will void your warranty.
If you decide you really do need/want to root, look in the 'All Things Root' section of your phone's subforum. Plenty of info is available. Also, Google search is your friend. Do a LOT of reading. It's possible a mistake could 'brick' your phone (make it unusable). Make sure you understand why you're doing it, the exact steps required and all the terminology, and have a recovery plan and backups in case things go bad. Nobody likes to bail out a n00b just because he simply failed to do his homework first.