Things I do what give me a percieved sense of privacy/ security:

• use Firefox with Add-ons (Ublock origin, Idontcareaboutcookies, Istilldontcareaobutcookies, Consent Blocker)
• browser set up to block third party cookies and to delete any cookies after closing
• not allowing to store any credentials in the browser
• using different passwords for different services (not one password for all)
• using Two-Factor-Authentification on services which are connected with banking account
• not using freemail providers for email
• using a temporary email where possible if registration is required
• encrypted hard drive and encrypted backups
• do not use cloud storage (I rely on old school portable hard drives and thumb drives)
• using an additional firewall to stop certain not-quite-legally-obtained programs from phoning home (these programs can't be replaced through FOSS at the moment, or are too ridiculously overpriced to buy them right now)
• restrict/ forbid operating system to collect anonymous data and to phone home (as if that helps...)
• don't do online banking with an android 8 device

The password storage thing sometimes seems to be a hassle. I have stored my passwords in a physical moleskin, written with a pen, like an old person would do. When I have that book not availiable (when travellling), I have to guess my credentials.

At work I have the browser stored all the credentials. It's so much faster and easier. But since it's at my job I don't have to worry about my own private stuff.