I was researching the "3-act method of plotting fiction" and found this website!
This link will take you to Author Randy Ingermanson's fiction writing site. Mr. Ingermanson is a theoretical physicist and award-winning author of six novels. I found it quite helpful, witty, and interesting. The site will speak for itself, and I hope you enjoy it.
(Obviously, if the link does not work, copy it into your address bar.)