Last night I faced a difficult decision. It was midnight. Should I go for bike ride, knowing that I would breathe more deeply and clearly afterwards, but also that I probably wouldn't settle into sleep until 1:30am or so, given the time it takes for my post-exercise energy burst to wane? Or should I head straight to bed, with the realization that my allergies would be worse this morning than if I had ridden? Are seven hours of somewhat fitful sleep better than five-and-a-half hours of slightly deeper sleep? In the end, I opted to go straight to bed. But I'm sure I'll be standing at a similar existential crossroads over the next week or two, until my allergies finally decline in force.