Social media is a marathon, not a sprint. Plan accordingly.
You should be able to mine content from most, if not all, of the people in your organization. If you can't, hire someone who can.
Sometimes the art is not in creating the post, but in editing it.
Don't pay much attention to social media stats. Remember: Facebook counts a video that has auto-played with the sound off for just three seconds as "a view."
Figure out one type of quality content that you can post at least once a day, five days a week. Make that your foundation and build from there.
The better you organize your content, the more use you will get from it. Learn to love spreadsheets and databases.
Adapt your content to the platform you are posting it to. Facebook, Instagram, Twitter, etc. work best with different formatting and different elements.