Today and Monday only, Target's Cartwheel app has a coupon for 15% percent off any item in their electronics department. If you plan on getting a PS4 or Xbox One (or a tv, iPad, etc) this is something you need.
A PS4 will end up at around 340 + tax, an Xbox One at 340 + tax (if the Kinect-less version is already out I haven't paid any attention to that) or 425 + tax (with Kinect).
If you don't know about Cartwheel, it is an app that Target provides for free with coupons that you scan directly at checkout. Today is the one year anniversary for it so they decided to go big with it. Get the app, sign in and add the coupon. Once you check out the cashier will scan the barcode on your phones screen and you get your discount.
If you have a Target Red Card you can also save 5%, or probably enough to make you forget you had sales tax on there.