how do you deal with paranoia?

[Nicholas]

My wife could very much create several pages on this topic if she was so inclined. But hey ho, I await with glee for the day she pushes me off the computer chair!

This is a major catalyst for both of us, both in terms of how it affects her and how I respond to it. Objective busy-ness is a great antidote in the immediate, talking therapy can be catalytic to grasping it's roots in the longer term. (like here for example)

Or you can simply challenge yourself when it arises and do the opposite to how you would normally respond (the lion metaphor of courage and strength). After all, it's subjective, so putting your hand in the fire won't result in skin burns, as you are aware, but name calling burns far deeper than the superficial pain of having sticks and stones thrown at us. 

Or there is this philosophical mantra: What anybody thinks or says about you is none of your business