Good Online Browsing Practices
Use a good Ad Blocker (for example, AdBlockPlus+).
Don’t randomly browse the web (without a controlled browsing environment, i.e. Tails).
Keep your browser up to date.
Use a password manager to generate, backup and secure your passwords.
Remove any unused or random browser extensions.
Make sure sites you transfer any sensitive data on are HTTPS.
Verify URLs of important tools from multiple safe and public locations (within reason).
Always assume software you are downloading is being spoofed or tampered with. Hash verification can go a long way (use GtkHash in Tails to conduct hash verification).
When using Tails online, do not plug in or insert any storage devices such as SD cards. Select reasonable network settings when you boot Tails.
Don't download everything you see on the Internet. Only download the very specific files you need and you intended to download, especially in the case of this book. Be reasonable here.
Regularly monitor accounts and bank statements.
Don't use unsecured or public WIFI; assume all data transferred over WIFI is compromised.
Use a VPN; it can go a long way in protecting your privacy.
Disable stored passwords in browsers.
Don't use Windows for anything, ever (IMO).
Always enable 2-factor, if available - use 2-factor apps like Authy/Google Authenticator and always remember to safely backup your 2 factor backup codes.
Here are some more guides on safe web browsing: