Here's how I was taught just recently to tune easily using harmonics:

Low E 5th fret harmonic = A string 7th fret harmonic
A string 5th fret harmonic = D string 7th fret harmonic
D string 5th fret harmonic = G string 7th fret harmonic
G string 9th fret harmonic = B string 5th fret harmonic
B string 5th fret harmonic = E string 7th fret harmonic

So, you see, the only variation is that the B string 5th fret harmonic is tuned to the G string 9th fret. I find that it is pretty easy to match up the notes.

Hope that helps.