You're only as anonymous as your weakest link.

• There are tools to remove exif data from images/videos.
• There are VPN/Tor services for masking your IP.
• There's disposable email for masking your personal mail accounts.
• There are a lot of fake GPS tools to mask your current location.

You are already 80% safe if you follow the above. The above data is what most security analysts use to create a digital fingerprint of you to track you across the internet. So unless you're a journalist/spy, you're safe.

but what if I am a journalist and need that extra anonymity?

Then there's also a few operating systems and web browsers that store telemetry (Microsoft & Chrome, ahem) which they are then obliged to share with government officials with a police warrant. To stay safe from that, use custom operating systems which block/spoof all telemetry attempts. The best one is Tails OS imo.

Finally, use separate user profiles, not linked to each other (use different time zones, different IPs, different emails, etc) such that each account has a different fingerprint.