Everyday dust or dirt can be wiped clean with a soft damp cloth. Allow to dry naturally - out of direct sunlight and without added heat.
Condition and Protect:
Leather is a natural material and needs some care to ensure it's longevity. Twice a year, or when your piece starts to feel dehydrated, treat it with something such as mink oil, neatsfoot oil, or a similar leather conditioner. These can generally be found at any store that sells quality leather shoes or bags.
Leather needs to breathe! Do not store in plastic. If you are not going to use the piece for a prolonged period of time, store it in a dust bag - a pillow case also works great. And remember - unlike fabric, creases in leather are very hard if not impossible to remove so store your piece in such a way that does not cause unnecessary folds.