Sometimes an item is so pretty, cute, fun, unique, etc that we have a hard time not buying it. Take a picture instead and leave the item on the store shelf for someone else to ooh and ah over as well. Trust that there are many fun items you’ll come across in life and you don’t need to own them to enjoy them. If you still remember it and really want it the next day you can then return and purchase it.
Most items we forget once we’ve left the store. You could also send the pic to a loved one with a prompt to get it for you.... Plus, while I know Black Friday sales are special, it's okay to spend a few more dollars on something you truly want.