AppleTV, Roku and Chromecast are always big favorites on the gadget front. They're pretty inexpensive and the AppleTV allows you to link your Mac, iPhone and iPad to the TV so you can view your photos, rock out to your music, and watch videos. You can connect your Netflix and Hulu to your Roku or Chromecast for more choices.
You can pump up the jam with the Ultimate Ears Mini Boom. It's a portable speaker that streams music through Bluetooth from your PC, phone or table. You can also plug in the headphone jack from your MP3 player. The battery lasts about 10 hours and it will fill up your room with tunes. Most models go for about $90. Click Click BOOM
The Fitbit Flex is one of the best wearables out there right now. It's like a pedometer on steroids. It monitors your sleep cycle and activities so you can set higher goals as you get in better shape and compete with your friends.