Didn't we work out an Official Scoring Method some time back?

Trainer miles count, but at a rate of at 50%
Dirt-road miles count at 110%
Commuting miles or touring miles (if you're carrying something) count at 125%
Miles up Mt. Doom (Pcad's nemesis) count at 150%, because he's old and decrepit
Miles in the rain (my specialty) count at 175%
Miles on a bike you want to sell so you can trade it on on something newer and flashier because that will make you much faster count at 200%