I never thought I'd do this again, but I've come back to play World of Warcraft. Yuppers. The terrible noob who mooches off of Sev has returned!

I'm going to start off fresh this time and start with an Undead Rogue. I started playing on a trial with Sev today, and we rolled Undead, he chose Warlock and I chose Rogue. So, I'm going to see if he'd like to roll that again.
He got a free month of WoW, too, since I upgraded again. He didn't have membership this month either, so I bought a month to surprise him and play with him on his trial, but instead he got a month too, so now we can both play

Any advice for a noobie rogue?