June 2019 Weddings

Hi everyone! So I am getting married next June (2019) , however, I have already booked the venue, DJ, and Photographer. My question is, with it still being over a year out, how often should I keep in contact with my vendors and venue? I usually stay in touch with both the photographer and DJ pretty well, but what about my venue for my wedding reception? Once a month? Once every three months? I don't want to over do it, but I want to make sure everything stays on track! Thanks!