Black Friday is no longer just one day. It's an entire week. Between the Nintendo eShop, PSN, GameStop, Xbox Live, and Toys R Us, there's no shortage of places to grab the games you want at discount prices. Yesterday, a Reddit user posted a one-time code that can give anyone a 10% discount on anything in the PSN Store.
Here's the code: D9NGJ7NF3L
That said, many PSN users are expecting Sony to launch a "surprise" Flash Sale on Black Friday, much like they did last year, so unless you are absolutely dying to buy something right now, just wait until Friday to see what the discounts are, and then use the code. You might find an even better deal than the one that you're looking at right now.