How do I come up with a good title for my novel?

One popular way to come up with a title for a novel is taking a key point in the story and using that as an element in your title. For example, if your novel were about humans making contact with aliens on another planet, you could title it based on that main event, such as Carl Sagan's book Contact. Similarly, you can also use a title as a form of summary for your novel, for example, Harry Potter and the Chamber of Secrets. The title of the novel provides insight into the actual focus of the book in that case. Finally, you could take an important word or moment in the book, like Twilight, and make that your title.