AeroWeather...all you need for TAFs & METARS.
Oh, and that little GPS track recording programme? Try Motion-X GPS - the 'Lite' version is free and gives you a pretty good taster. I wouldn't live without it now.
Darkness - to figure out the twilight times anywhere in the world.
..and for morale on those long dark night? You have to go a long way to beat 'Gym Babes'
Uncle G