Usually someone makes a post, either a single art post or sometimes journal entry, give some rules about what you are willing to draw for the winner, and the requirements for joining(be a follower, make a journal entry, and replying to your comment, sometimes having them link the character they want drawn). You assign each person a number, then use a random number generator site to pick the lucky winner.
Usually someone makes a post, either a single art post or sometimes journal entry, give some rules a
