For me, motorcycle. Through the mountains. Far away from any distractions (the thinking is, they have to catch me, first!

)
A favorite of women, I've noticed through the years, is a bath. Any time of day. I used to think women were just cleanliness-minded, but I finally twigged--it's the great Chick Trick! That's where women go when they just want to be alone!
Basically though, any place where you won't be distracted.