You should first begin by making a recollection of the ideas that you actually know. The ideas that you think of must be those that will raise attention-grabbing questions or create extraordinary thoughts in your mind. In a number of cases, you will also have to bring in what you have observed from daily occurrences. These will be those ideas that you could more methodically look into with the aid of books and other written sources. The ideas could further be on what you have read or learned or from what you can think of.