So this might be common sense, but atleast I did not know of this before today when I found it - and I figured I might aswell post it here!
This only works for full holypaladins and it is very simple - basicly you put beacon on (one of) your partner(s) - and since beacon now works with overhealing you can stand 60 yards away from them, heal yourself (as long as you remain in los) and they will get the full effect of the heal.
Now the very best part about this is that, if you are in combat when healing yourself (and thus, healing your partner) you will remain in combat, however if you are NOT in combat you will not get into combat! Meaning you can sit down and drink immediatly after the heal - regenning your mana back from a safe 60 yards distance!
As I said I would expect most experienced holypaladins to already know of this, but I did not and I think it will be really helpful in the future! Enjoy!