Advice for drinking your best wines

I was presenting a selection of ten Rhone wines at the NatWest Bank Wine Society last night in central London. I will post notes later but at the start of it, one of the the members came up to me to thank me for some tips I had given a couple of years earlier (I don't remember but I'm happy to take the credit!). Best of all was: when you want to open a bottle of really good wine, don't do so at a dinner party where most people won't appreciate it. Better to save it for an occasion where there are just two of you, the other one preferably teetotal.