Here you have a good introduction to link baiting, different types of link baiting, pros and cons, and then you also get 20 tips for successful link baiting. A link baiting is pretty obvious, it is to make something that will be linked often from other sources without you doing anymore effort. Then, now you think, what can work? The answer is not so easy, because sometimes you can do everything good and simply it won't work. Like many things, you have to do trials and errors to have successful link baiting experiences that you can reflect upon later on.