There's this neat time calculator on the internet at www.timeanddate.com .  You can actually calculate the time between two dates down to the last minute.  I recently calculated the time from now until my 40th birthday.  The answer : 40 weeks.

With that in mind, I should write down the 40 things I want to do before I turn 40.  That way I'd have one week to do one item on the list.  Now, to get my pen and paper....