The ol' right-to-left (or left-to-right) handoff is a real thing. Ever had to curl or brush your hair with the opposite hand than you're used to? Were you frustrated? Good. "Anything that makes the brain work harder or that is frustrating is a good thing," says Schwartz. Regularly change your hands when using your toothbrush, hairbrush, blow dryer, or curling iron. The brain becomes conditioned to routine activities, and using your nontraditional hand makes new synapses fire to detect the way a device feels and figure out how to manipulate it correctly. "Forcing myself to do a manual task a new way helped clear my mental fog," says Curran. 
