I’m going to add something to the list. Get great headshots!! I know several actors who were not getting great responses from submissions, who then went and got new headshots. Boom. They started getting called in for appointments. Two of them recently booked great jobs from those submissions. You can’t book if you can’t get in the room. You don’t have to pay $500 to $1000 either to get them. PM me if you want a referral.