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.