What are the habits you want to add or subtract from your life that keeps alluding you despite your best efforts?  Or, what's that habit on your nightly checklist you keep circling instead of crossing off? Well, whether it's meditation, journaling, exercising, or eating more fruits and veggies, what's worked for me is a tool Jerry Seinfeld popularized.  His foolproof method to add a habit is his calendar system.