5 Important Tips for Storing Firewood:
1. Make sure wood does not make direct contact with the ground
2. Keep wood away from moisture at all times
3. Store wood as close to your heater as possible
4. Stack wood in a well ventilated place
5. Enclose firewood so it is covered while maintaining air flow
When deciding where to locate your heater, the placement of your outdoor and indoor wood storage areas should be taken into consideration. The paths from all wood storage areas to the heater should be as short as possible and involve no stairs. The outdoor area should be well-ventilated, dry, sheltered from rain and snow, and enclosed so the wood doesn't require repeated covering and uncovering. Just as you wouldn't go to the petroleum-products store to replenish the fuel every time the oil furnace kicks on, you'll want to move your firewood as infrequently as possible, in the largest possible loads, and as close to the heater as possible.
The main factors are that the wood is off the ground, rain cannot fall on it, there are walls or something to protect the sides, it is good to have as much air movement as possible, open on the front works well, it needs to be tall enough to get into without hitting your head, and you want to be able to store enough wood for two seasons and be able to get at the older wood that is driest when needed. About 4+ cords is what I would want. It can be very simple or complex. It can be open on two opposing sides for access on both sides.