LPT: Email yourself the paint information when you paint your house.

Send an email to yourself when you paint a room in your house so you always know the exact color code to match in case you need it later. When you update a color in a room for the same address just reply to original email with the updated info. I include color code, name of the color, brand, store, product line, finish, and the room(s) it is painted in.

If you have a rental or rentals add the address to the subject line and keep multiple emails. This has saved me a number of headaches over the years as paint labels get painted or rusted over. Sure you can do it in excel but with phones these days you can just search for "paint" and it pops up.