Extra protection: Antivirus is a must-have for most computer users, but most antiviruses don't stop adware and other junk that aren't true viruses but can certainly also cause problems. So, I suggest having additional protection. My favorite program for this is MalwareBytes Antimalware. It's free to download (www.malwarebytes.com) and run manual scans, but it's a good idea to buy the premium edition to have active protection all the time.
Peripherals and accessories: When you're out shopping, browse the computer section for any neat peripherals or accessories. If you have trouble reading the keys on the keyboard, look for the keyboards that have the large print and high-contrast colors. Or a keyboard that's backlit so you can see the keys in the dark. If your surge protector is many years old, perhaps get a new one to better protect against power and lighting damage. If you have a smaller monitor or one of the old square ones, maybe look at getting a bigger wide-screen one.
Upgrade to Windows 10: If you're still using Windows 7 or 8, you might want to take advantage of Microsoft's last offer to upgrade to Windows 10 for free. There's less than two weeks left! After December 31, you'll have to pay up to $119.99 (or $199.99 for the Professional edition) in order to upgrade your computer to Windows 10. If you're still using the unsupported Windows XP or Vista, I typically suggest just replacing the computer.
Upgrade to a Solid State Drive (SSD): If you want to be extra nice to your computer this year, consider replacing your old traditional hard drive with a SSD. The old hard drives have moving parts that work slower, put off more heat, and consume more power. The SSDs have no moving parts inside and can give your computer a significant performance boost. I highly suggest contacting a professional to upgrade to a SSD, and they can also check if your computer is worth the investment.