How do you come up with a title?

I come up with something that is intriguing, clever, and fits the theme, or I take a random part from a sentence that says everything. It's "The Lovely Bones" by Alice Sebold. At first you don't notice what the heck it has to do with the book. But then you get to the most powerful, heart-clenching, perfect sentence and it all comes together.

Simply find a concept of your gripping yarn that seizes you, or could sum up your piece in a phrase, and then apply it as a title. For example, when I write, I always browse my work, and look for a phrase that I felt inspired by writing, and if it conveys the true feeling of the story, I apply the phrase, or a shorthand version, as a title.

I would pick a Name or word related to the story, like when Shakespeare created the play called Macbeth, It was about Macbeth and how he turned bad. Shakespeare just called it Macbeth because it was about Macbeth. This is also the same with Romeo and Juliet.