first, u need to get a good rational and logical thinking ablility which can lead u to think about the question radically. Do not think it is ridiculous, actually it is availiable. For instance, if u want to write a essay about the technology development's effect on the society, what u need to do is to connect the high-technological products in ur life to this topic. For instance, Computer is a high-technologicalproduct which developed by Steven Jobs, and this product has prompt the developmentof the society by increasing the working efficency and innovating a new working techic which can easily get the information u need.