I just got my S3 2 weeks back and was thinking to root it. Since I'm new to android, I have a few questions to ask.

1) I am currently on DXLF3 firmware. How do I find and restore to this stock ROM in case I wanna revert back?

2) Which ROM is preferred here? Heard most of you recommending Wanamlite?

3) How do I backup everything before starting rooting?