You should store it in a dry cabinet or a drybox. If you don't wish to spend so much, a cheaper alternative is to put your digicam in a ziploc bag or airtight bag, make a small packet and fill it with silica gel (silica gel can be bought in 500gm containers for less than $5) then seal it with sticky tape. Place the packet with silica gel and place it in the ziploc bag with your digicam.
Do remember to change the silica gel once it turns pale pink in colour or approx. once every week.