From their site:
Have you ever had a eureka moment? Tell us about it.
Think back on the instant when everything became clear. The split second when you realized that you had chosen the right career. Or the moment when you knew that your dearest friendship would last forever. Whether your epiphany changed your life or just made your day, write it down and share it with us.
Enter Real Simple’s seventh annual Life Lessons Essay Contest and you could have your essay published in Real Simple and receive a prize of $3,000.
Send your typed, double-spaced submission (1,500 words maximum, preferably in a Microsoft Word document) to firstname.lastname@example.org. Contest begins at 12:01 A.M. EST on May 9, 2014, and runs through 11:50 P.M. EST on September 18, 2014. All submitted essays must be nonfiction. Open to legal residents of the United States age 19 or older at time of entry. Void where prohibited by law. (Entries will not be returned.)