For the most part I sort by season, and before heading out I usually check the weather report. These days when I'm in a rush and it's hot out, I reach for something soapy/laundry smelling and just use a little. Sometimes when there's more time to choose, I might reach for the ones that I know don't get a lot of use (if I feel they're right for the temp/humidity).
Also have to ride a couple packed trains in the morning so I need to try not to suffocate anyone.๐ญ