Keep Paint Chip Card for Future Use

In each room I store a paint chip from the store for that room. Should I need to touch up the paint for that room or want to repaint it, I have all the information on that card. I also write on the card how much paint it took for my next paint job in that room, and if I used flat, semi-gloss, etc. It is also handy to grab if I want to match it to fabric, curtains, pillows, etc.

I have done this in each house I have lived in, and when I move I leave it behind for the next owner. In the houses I rent out, I have one for the renters should they need to touch up the paint, and a copy for my records in file for that particular house.