I decided beforehand that I wasn't going to buy anything for Black Friday/Cyber Monday this year because I always obsess over it and end up spending too much on crap because I think I have to get everything I could possibly ever want while it's cheap.
I waffled on a couple things until the coupon codes were no longer valid, which helped me not spend money. The only thing I ended up buying was Mario Odyssey for $35 at Walmart since I had intended on buying it anyway, so I might as well get $15 off.