I guess this might qualify as a little quirky... While staying safe, I move side-to-side on the trails in order to position myself in as much shade as possible. Especially during the summer months, there is a pretty big temperature differential between shade and direct sun.
I also talk to the animals as I approach them. Sometimes the cats and squirrels do not realize I am coming and it helps them to get out of the way.
I try to say something nice to the humans that I pass too. I hope it cheers them up a little bit and it helps to let them know I am approaching. And, sometimes they something nice back.