Its all about joining the dots on your life canvas.
Each time you have a new experience in life you gain an additional dot, and once you have accumulated enough experience dots you can often join the dots and identify your true passion.
This comes from a wonderful speech by Steve Jobs I came across recently - http://www.youtube.com/watch?v=Hd_ptbiPoXM
A custom order for a friend who insisted me to make a personalized calendar she wanted for her husband's birthday. I was lil apprehensive first but I am glad I did.
She totally loved it and I totally love the idea of personalized calendars!