You probably shouldn't have rooted in the first place. You should have learned and researched first.
Despite popular belief, having root does NOT in fact make you cooler.
Way too many new users are trying to root because they think it's cool or heard it's cool. Well; it's not cool to be a n00b and attempt root. You need to learn your device first.
If you don't know how to perform a Nandroid backup, or restore a previous ROM backup, flash updates, install custom ROM's, boot into Safe mode, Mount R/W, run shell commands or Terminal Emulator etc, then you should NOT root. You should browse the forums here, read and re-read everything until you know it well. Google search related topics. Exhaust all available avenues, then ask questions. After you've executed all of these options you might consider rooting and starting to tinker with your device.
If you don't even know what some of the things are that were mentioned, then you should absolutely NOT root your phone. You will likely brick or screw up your phone and then be right back here begging for help in a new thread most definately created by you out of haste or costing HTC/T-Mobile money by sending your phone back and asking for a replacement simply because you had no idea what you were doing. JMHO
#include <std_disclaimer.h>
/*
* Rooting voids your warranty.
*/