Take Duct Tape to the Next Level (Everywhere) - And other ways to make a fully loaded wallet.

Step 3 Embellish!

On the side there is enough room for some electrical tape, paper clips, safety pins, fish hooks, etc.

One cool option is to notch the ends of the card, and wrap thread or fishing line around it.
I have a simple set up in the picture, but it is useful, it gets the jobs done, I will upgrade.