Check out https://hootsuite.com/
You can have a basic account which is free and allows to to schedule updates to go to your social media sites. Or I actually pay for hootsuite pro because I like being able to auto schedule tweets too by just clicking a template. The site has great tutorials if you want to get more indepth.
Marketing is your bread and butter. You can produce fantastic videos and photographs, but if no one knows they are available to be purchased what good is that to you??
As a general rule I tweet at least one clip or picture with a link to my clips4sale, southern-charms or elizaallure.com every hour. With hootesuite I can schedule my tweets for the week one or two nights a week and be done with it. I am not wasting my time on social media. I get to make money while I am focused on my family.