So if you've been considering buying one of those LG monitors, today is definitely the day to do it. The 21.5-inch 4K display currently sells for $524, down from $700. The 27-inch 5K screen is priced at $924, a pretty notable discount from the $1,300 it will cost tomorrow.

You're not going to save nearly as much cash on cables and adapters, but Apple is still offering pretty steep discounts. The super-helpful USB-C to USB dongle is $9 right now, down from $19, while you can save $5 on USB-C to Lightning cables for your iPhone or iPad. More expensive multiport adapters for outputting video to external displays are $49 instead of $69. All third-party USB-C accessories are 25 percent off, as well. If you've been thinking about buying a new MacBook Pro (or already have one) and have been dragging your feet on getting the cables you need, now's a good day to go get them.