Here is my list:
1. Be relevant (make your posts based on a season or holiday)
2. Keep your posts short and straight to the point.
3. Be entertaining (funny memes and videos)
4. Interact with the followers: follow people who like your pictures, compliment or comment on their posts (put a spotlight on them once in a while)
5. Introduce the person behind the brand/company to people (share the behind the scenes every now and again.)