I stopped smoking about two and a half years ago. Since then I've picked up a crazy cheesecake habit. It's become somewhat of an obsession for me; finding the perfect cheesecake.I've found some fantastic cheesecakes. I've found some horrible ones too. What I have realised is that I like baked cheesecakes and dislike fridge cheesecakes.The main reason I am writing about cheesecake is because of a theory I've developed that I managed to put into words while eating a cheesecake.This particular cheesecake was a tall, creamy, wide cheesecake and I was given a fork to eat it with. I placed my fork at the peak of this cheesecake mound, slid it down and cut through the cheesecake all the way down to the crust which was hard to break off. Pay careful attention to the next part now: The top of the slice I had just cut off fell over onto the plate at the middle of this very tall (too tall) piece of cake.The point, for the sake of clarity: The cheesecake looked amazing but the width of the fork was half that of the height of the cake so I couldn't get a clean slice of my cake onto the fork.It's as if the person who made the cheesecake had never eaten it with the fork that they give their customers. Here's where things get metaphorical.The Cheesecake Theory now applies to everything in my life.Have I used my own product? Have I tested it with the tools I give my customers? Does the website I just launched work on the devices that people have? Cheesecake Theory.Eat your own dog food, use your product, test the things you make with the tools your customers have at their disposal.Only then should you launch the product, website, restaurant, cheesecake, shoe, wristwatch or whatever it is you peddle.