I have bought a t440p (and a cheap x230 alongside it), a security key, some glitter nail polish, and foil.
I have installed the heads firmware on my devices, and I have removed the fan to prevent possible datamining, I have also installed Gentoo with a usb key (different from other security key) + double password AES-512 encrypted hard drive to ensure security, I have placed nail polish on the laptop back cover to prevent tampering.
I got rid of my phone, and thankfully I live alone so there are no phones nearby.
What other security measures should I take? Serious answers only please.