Spares

Buying up spare items is only good if they are consumable, not perishable.  Spare items must fit in your space.  If you have a tiny apartment, you won't be able to purchase the value packs unless you find a space elsewhere.  I did read of a woman who had a high bed and stored extra bargains in bins under the bed to make good use of unused space. 

One spare item is often enough.  When you take the spare to use, write the item on your list to buy the replacement.  Remember that a bargain is not a bargain if you won't use it. 

Too much of a good thing = clutter