My college didn’t have secret societies and that was no fun at all. I always wanted to be in one. One night, my roommates and I concocted a plan whereby we could start a secret society, give it a history and create a system that would renew it with fresh members each year. We never executed our plan but that doesn’t mean you can’t do it!
Pick a name. I think we settled on The Order of the Ram (a ram being our school mascot). Translate that name into latin and create a seal.
Get 48 rings/buttons made bearing the seal. The more expensive the metal, the better.
Pick 12 Juniors you want to be members of your secret society. It’s better if they’re not friends and have a wide range of talents and interests. (that way they’re more likely not to question it) One night, present them all with rings/buttons and say that they have been selected for membership (make sure you and your friends are all wearing the ring/button, too). Explain it’s (fake) history and purpose (which should be something like “To foster a kindred brotherhood between those ______ members who have already made their way in the world and those who are about to embark.” Something that implies it’s a powerful alumni network that will help them professionally.) A good tip when it comes to picking an age for the society is to find the halfway mark in your school’s history and subtract 8 years. So if your school was founded in 1868, your society should date from 1932.