Use the knuckles trick: http://lifehacker.com/232828/macgyver-tip-use-your-knuckles-to-remember-each-months-days http://lifehacker.com/232828/macgyver-tip-use-y

Use the knuckles trick: http://lifehacker.com/232828/macgyver-tip-use-your-knuckles-to-remember-each-months-days http://lifehacker.com/232828/macgyver-tip-use-your-knuckles-...