>>989533 (OP)
There's no way to stop online tracking unless you just don't use 80% of the web based sites and services out there. You can block scripts and stuff but it'll only break the functionality of the sites you visit. Realistically, all you can do is host your own mail server for personal use and work on securing all of your machines.
>secure the software
Lucky for us, it's simple enough these days to wear a tinfoil hat without sacrificing too much functionality. It's quick and easy to install a free and open source operating system like Linux or BSD. Linux and BSD systems have fairly strong security out of the box with sane defaults. Keeping your system up to date is also important. Check for updates once a week like you're doing laundry.
>secure the firmware
Use as little non-free firmware as possible. What I mean by firmware in this case is high level firmware that's access by the kernel, aka drivers. Having open source firmware for video cards and networking hardware makes your hardware selection somewhat limited but by no means difficult or expensive to acquire. Hard disk controller firmware isn't a threat as long as you secure your hardware, which I'll get to next.
>secure your hardware (on-board firmware)
This is the firmware that's in EEPROM chips on your motherboard. On modern x86 machines you'll have a BIOS/EFI that searches for a hard disk and boots a bootloader or kernel, among other things. You should replace this BIOS/EFI system with Coreboot. GRUB makes a fine payload but if you want something more advanced I recommend Tiano Core, which offers a free and open source EFI implementation. Be sure to strip your Intel Management Engine firmware with me_cleaner to clear out all possibilities of remote access to the IME. It'll still be active and running but it's localized and the EEPROM region isn't readable or writable from the OS. AMD processors are even better. They still have the PSP but it's a localized threat out of the box, since the PSP doesn't do networking. It only handles Secure Boot and TPM stuff.
>secure your hardware (physical access)
Notice how I didn't even recommend disk encryption. Disk encryption doesn't matter if someone has physical access to your machines. Keep them locked away inside your home or on your person at all times. If your really want your placebo data scrambling bullshit, I recommend LUKS and Twofish. But don't be surprised when your non-free hard disk controller spits out your encryption keys to CIA basketball Americans.
I know this post is a bit lengthy but it'll help quite a bit if you do these things. And one more thing, get a router that respects your freedoms. It's more important than you think.