I love just spending time in the pastures, observing herd behavior and interacting with my horse at liberty. That's also a great way how to show your horse that you're not always equal to work and work only, and that may assist in helping him become a more willing partner. Be safe and sure about your personal space when hanging out with the herd, though!
I also enjoy going on long trail walks in hand - a great way to keep fit your own body and to show your horse new places, graze on wild herbs, etc.
I have come a long way, to surrender my shadow to the shadow of my horse.