And then off course there is the en-route alternate airport to reduce your contingency down from 5% to 3% (no.....not the same as a Reclear!)
In this case the enroute alternate aerodrome must be located within a circle, radius equal to 20% of the total flight plan distance, centred at a distance equal to 25% of the total route distance from the destination or 20% +50nm, which ever is the greater!
