Grazing. This is a great time to spend with your horse. Just being near your horse while it is munching away on grass can be very relaxing for you and your horse.
Grooming. Horses loved to be groomed. Groom your horse as often as you can. This will help with circulation and massages large muscle groups.
Go for a walk. This is good exercise for you and your horse.
Get moving! Let your horse run and keep him or her moving. Get the whip and make them get their aerobic exercise in.
Give your horse a bath. After you have exercised them on a hot day, a nice shower is always appreciated.