Just sing "I'm coming out" by Diana Ross at any given time of day

Get a big box and fill it with rainbow balloons and write on them with a sharpie saying 'I'm ____' (then ya just fill in the blank)

Write it on a piece of fruit and give it to a friend or family member

Literally walk out of a closet and scream, "I'm gay/Les/bi/pan, etc."

Change your lock screen on your phone to I'm gay and wait until someone opens it

(I found other ideas on BuzzFeed that were pretty cool)