I found this questionnaire on Pinterest and though I followed link, after link, I could not locate who came up with the questions found on it. I just wanted to point out, I did not create this, I found it on one of my go-to writing research sites, Pinterest. And it has helped me connect with my characters so much easier than the old methods I used.
After you answer these questions for your character as your character, you have a pretty idea what they will do in just about any situation. Of course, it does not work well for child characters or if you are writing fantasy or a regency romance. But for contemporary, earthbound characters, it works perfectly!