The first one I thought of is really gross...Putting earwax on a cold sore will make it go away.
using warm salt water to draw the nasiness out of an absess(sp)on infected gums or tooth
after having a baby you should use a little of the old school lysol(the brown kind) in your first bath at home, it will clean away any infection in stitches.
Hot toddies will make you sweat out a fever (a combo of Jack Daniels, lemon, honey, and tea)