Whether you’re on vacation, or walking in your hometown, you’ll see people. If you spot someone interesting, write a brief description of the person in your notebook. You do have a notebook with you at all times, don’t you? This person could be a prototype for a character in your next novel or short story. If possible, take a picture of the person. But be cautious when photographing people on the street. If someone looks at you after you take a picture, shrug your shoulders and smile. If someone asks you to delete the image, delete it. The goal is to find characters for your novels, not to put yourself in danger.