This article from Bob Vila gives eight handy tips to consider when using your basement for storage.   The suggestions include taking advantage of vertical space by building up and not out, using open shelves for frequently-used items and built-in cabinets to conceal toys or cleaning supplies, storing off-season gear in sealed bins to protect from moisture and dust, using a pulley-hoist to store heavy or bulky items from the ceiling, protecting tools stored in the open with a coating of machine oil to prevent rust and running a humidifier in the basement to suck moisture from the air and combat mold or mildew.  To read more click here.