For mere pennies you can construct your very own AFDB - an aluminum foil deflector beanie.  This invaluable piece of head wear will keep out the probing of the nefarious black helicopters (as well as your creepy, voodoo-practicing next-door neighbor).  Full instructions are on the AFDB site.

If your problem is not with terrestrial mind control but comes from a little further away, Steve has pointed me to the Stop Alien Abductions web site.  This site has instructions for creating a stylish helmet to insulate yourself against alien mind control.