The 70 / 20 / 10 Rules

70% - Should be Valuable related to your niche ( Information Post, Quotes related to your niche, share other people content ) and not selling anything

20% - Should be related to your Business ( Leads Generation )

10% - Should be not related to your niche or business, just icebreaker like Humor Post, Joke, Share your interesting experience for the day - Be Human ( not related to your business , like meme's, Humor, motivation quotes )