If this hasn't happened to you it has definitely happened to me! All of your cards and envelopes are disorganized! You don't know what you have and end up buying more than what you need. Well here's my little secret. Go to your local dollar store and look for baskets that will fit your cards. The cards that aren't used put them together with their corresponding envelope and then put the extra envelopes and cards (if there's any into separate baskets)Card Patterns and templates same thing. It may sound silly but I have separated all my patterns for card making and scrapbooking so I can find things easier.
Hope This Helps! :)