Start with what Phildo said....
Think of it like having a super hero secret identity. You want nothing connecting it to your real life.
Second, I will completely back the use of Google Voice. Learn it, live it, love it. You can get a little app called Groove IP that will let you do GV calls and texts over Wifi so you can have an old phone without a contract or anything, and just use it wherever you have WiFi.
If you can, find a place you can have a "locker" that you can store your secret identity in.
Oh, and whenever possible wear a luchadore mask and speak with an accent