Granted, I understand there is a time for expensive fancy cards - Mother's Day, etc. But even if you spend $7 on a card just for those few occasions - think of how much else you could save throughout the year on all the other cards you buy! Maybe you don't need a full cart (I admit I'm a little excessive with sending out snail mail - but sorry, I just can't send my grandmas an e-card [shudder...]
So grab a cart or a bin or a photo storage box (however much space you need) and stock up on all the cards you need for the year (birthday cards and thank you cards mostly!) and get organized! :)