Think for a hot second about all of the personal information you store on your devices: Emails, family photos, business, property, health, and maybe even banking information. That means you'll want to protect your digital life with strong security settings from the get go.
Set up a PIN code, fingerprint, facial recognition, pattern, or password on your start screen. If you see a prompt for two-factor authentication, do that, too. Be sure to enable Find my iPhone or Lookout on Android devices.
For computers, be sure to set up your screen lock password. On Windows machines, find this option in Settings under Accounts and Sign-in. In macOS, open System Preferences and look under Security & Privacy. Once you've protected your computer from snooping strangers, add antivirus protection. On Windows, the built-in Windows Defender is enough for most people, but if you want extra peace of mind, install a third-party package like Bitdefender Internet Security ($49.99) or Norton Security ($39.99). For macOS, try AVG Antivirus (free), Bitdefender Antivirus ($49.99), or Sophos Home (free).
One last note: the FTC says tech support scams are running rampant right now. Be sure that wherever you're reaching out to for help, that it's legit by checking with the BBB, or staying with the company's own site. Don't click on attachments or links sent via text, email, or DM, and when in doubt, ask your tech savvy friend (or me) about it first.
Jennifer Jolly is an Emmy Award-winning consumer tech contributor. E-mail her at firstname.lastname@example.org. Follow her on Twitter @JenniferJolly.