Question special

Some physicians are hesistant to share anything 'work-related' in social media due to HIPPA related concerns, while others are prolific producers of content and use social media to educate patients and/or build their brand. With this in mind:
1. What is 'safe' to post about work on social media?
2. How should physicians go about obtaining consent to post inspirational or educational patient encounters online? How do you approach this topic with patients, and do you use a special consent form?