I'll be honest, Equinox's refrigerated eucalyptus-soaked towels convinced me to join the gym. The camphoraceous oil makes me feel like I can breathe deeper, so I turn to those towels when I'm recovering from a cardio circuit. To make them at home, submerge washcloths in a bowl of water filled with ice water and two drops of eucalyptus oil. Squeeze out excess water and store in the fridge. My dad totes them in a soft ice chest when he's playing golf or otherwise outside on a hot day.
I also like to add a drop or two to the floor of my shower in the morning. The steam from the shower and scent of the oil makes me feel like I'm in a steam room. If I have chest congestion, I also may rub a couple of drops on my chest, but I always wash my hands afterward to prevent any burning.