I would suggest a closet! I keep mine in a closet and it has worked out so far.
Cool and Dark are the two biggies. Sunlight breaksdown the bottles contents faster as well as heat.
I have found a closet to help the most but some use mini-fridges, draws, and bathroom counters. It is really up to you. Deffinately keep them out of the sun and as far from heat as possible. Keep your boxes. That will help tremendously!!