This is an excellent list of a dozen techniques further ennumerated in the article below:

https://www.pcmag.com/article/360806/12-simple-things-you-can-do-to-be-more-secure-online

Making your devices, online identity, and activities more secure really doesn’t take much effort. In fact, several of our tips about what you can do to be more secure online boil down to little more than common sense. These 12 tips for being more secure in your online life will help keep you safer.

1. Install an Antivirus and Keep It Updated
2. Explore the Security Tools You Install
3. Use Unique Passwords for Every Login
4. Get a VPN and Use It
5. Use Two-Factor Authentication
6. Use Passcodes Even When They Are Optional
7. Pay With Your Smartphone
8. Use Different Email Addresses for Different Kinds of Accounts
9. Clear Your Cache
10. Turn Off the ‘Save Password’ Feature in Browsers
11. Don’t Fall Prey to Click Bait
12. Protect Your Social Media Privacy