A common trope of paranoid people is the wearing of a hat made of tinfoil, in order to sabotage attempts to control their mind. MIT did a study proving that actually trying tinfoil hats would make all effects worse instead.
Assuming telepathy and mind control operate with electromagnetic waves, the best defense against them would be a Faraday Cage, preferably with a ground. A brass mesh seems to be the best material for a hat, but since it is uncomfortable to the touch, it is probably best sewn into cloth that makes up the final hat. It can be grounded with a wire that connects to a metal pipe via a connector.
I'm not going to get into the electrosensitivity people just yet.