Entering Passphrases or Seeds
Remember when entering passphrases to use a combination of the keyboard and a virtual keyboard (like the Florence Virtual Keyboard that is a part of Tails OS).
To use the Florence Virtual Keyboard in Tails OS, click the keyboard icon at the top nav of Tails to prompt.
Consider entering rubbish in your physical keyboard and then delete it in your virtual keyboard as a form of misdirection.
Keep electronic devices, cameras and microphones away from the device, preferably in a separate room.
If you want to be really wild throw a blanket over yourself and the computer. Tin-foil hat not required… yet.
I'd also recommend using an Offline computer with Tails OS installed. It is a good environment to enter, store or handle seeds and passphrases for anything.