That's a good start. But you're still vulnerable if you do everything in one OS. And no matter how you physically compartmentalize, you're still vulnerable if y

That's a good start. But you're still vulnerable if you do everything in one OS. And no matter how you physically compartmentalize, you're still vulnerable if you're posting all of that as the same persona. Even if it's not you're real name. Because it can all be correlated easily. And even using multiple personas, you must take care to avoid linking them. No common social media, forums or mail lists. No cross-linking, or mentioning each other. No telling anyone about links between them. And as much as possible, no shared interests, especially specific ones. Instead of using one OS with multiple browsers, it's better to compartmentalize in multiple VMs. Each VM should reach the Internet through a different nested chain of VPNs. And for more anonymity, you can use Whonix for Tor. Also, it goes without saying that the machine should be full-disk encrypted, and that you should avoid Windows. When it really matters, you should use multiple physical machines, on separate LANs. And of course, be careful not to share USB drives among them.