A lot of folks may have signed up for an Amazon Prime Rewards Visa card in the run-up to Prime Day in order to get the usual perks. It can be used anywhere and earns Prime members 5-percent back at Amazon.com and Whole Foods, 2-percent back at restaurants, gas stations and drugstores, and 1-percent back on all other purchases. There is no annual fee. And international travelers will not be hit with any foreign transaction fees. If approved, you'll get an $80 Amazon gift card.

But, for the next few days, the Prime Rewards Visa Card can also earn you 15- or 20-percent back on a few select products for a limited time. You can earn 20-percent back on Jabra Elite headphones and 15-percent back on a wide range of Bose products, a Samsung soundbar and APC surge protectors. The Samsung offer ends on July 20, the Bose offer end on July 21, and the Jabra and APC offers end on July 31. 

There are also non-tech cash-back offers: get 15-percent back on cycling, surf, snow and other outdoor gear. These offers end on December 31.

As always, be sure to check the fine print.

Roku is our top choice for smart TV operating systems, but Amazon's Fire TV is in the running -- especially now that YouTube is fully supported. Yes, it's a bit odd that Best Buy's house brand, Insignia, is being sold by archrival Amazon, but today's media and retail landscape makes for strange bedfellows. The important thing is that you can get $80 off a 50-inch 4K TV.