Size & Weight Efficient- Items you carry would be as light as possible but also not take up unnecessary amounts of room. This is something women tend to follow when they look for purse items. After all, you will have to carry these items, so the lower the burden, the better, and you are more likely to stick with this system if it isn’t a burden.
Multiple Applications- When you can, try to have items that perform multiple functions such as a phone case that has card slots in order to have all your cards and your phone in one. Or perhaps a wallet that simply clamps your cards together and does not take up unnecessary room like a standard leather or nylon wallet.
Minimalistic- Don’t mistake this to mean having less or having ineffective items. This could mean having so many cards that you will definitely not need day to day in your wallet. This can result in the wallet taking on the form of a tumor rather than an item consolidating all the necessary items for day to day transactions.