Official? In what way official?
And there really isn’t a “best” way to do this. The two decryption/ripping programs that are most liked around here are DVDFab and AnyDVD, mostly because they are still being updated. But some still use RipIt4Me for most of their rips, and some just choose to use the free section of DVDFab.
That’s the easy part—figuring out how to get it from the disk to the hard drive.
From that point on you’ll not find much agreement. There is a general understanding that encoders produce superior results on highly compressed movies, but where’s the cut off point? How much compression is too much from a transcoder? When do you give up on compression altogether and just go to a dual layer dvd? You’re not going to get hard and fast rules on these questions, just opinion.
So, no, I don’t agree that you can even make such a guide, much less that one is necessary. Your best bet is just to experiment, read a lot and find out what works for you. If you run into a brick wall, make a post. We’ve probably got a few forehead marks in that wall already.