I finally found a reason to use my TV's USB port, and it's a game-changer

You can use your TV's USB port to dramatically increase its Ethernet speed, and all it takes is a cheap adapter.
How-To Geek on MSN

Please stop using your monitor as a USB hub

Monitor USB ports are nothing more than extension cords.

Here's What You Should And Shouldn't Plug Into Your Monitor's Built-In USB Ports

Monitor USB ports work great for some everyday gadgets, but they're a poor fit for others, especially anything that requires ...
makeuseof

Your router’s USB port is wasted if you only use it for files

Lurking at the back of your Wi-Fi router is a USB port that most people use to store and transfer files. Now, that's a good use for your router's USB port, don't get me wrong. But the port can do a ...

You May Be Plugging Your Fire TV Stick Into The Wrong HDMI Port

It's not so much about using a wrong port, and more so about freeing up the more capable ones for needier devices.