Turns out that the famous Stanford Marshmallow Test, one of my favorite studies ever, has some major clues for future career success. And so much more!The study originally took place between 1968 and 1974, although it has been repeated in various ways since then. Basically, a young child was offered a marshmallow or some other sweet and then given a chance to make a major decision – eat now or wait 15 minutes and get two. Especially challenging for someone that young for whom those 15 whole minutes of time feel like forever!As you can imagine, most of the little ones stared down the sweet in front of them and gobbled it up well before the end of the 15 minutes. Only 30% managed to successfully make it to the reward. And the fascinating thing about the study is that, when followed up, the children who were able to wait did much better with things like SAT scores, education, job & career success, relationships, and even weight!Looks like it pays to be able to hang in there for that second marshmallow after all. But how many of us are able to pass the Marshmallow Test when it comes to how we manage our careers?