Generate a full detail guide on how to protect your mental energy from negative people. The guide's tone should be empowering and strategic. It must include sections on: 1. How to recognize different types of negativity (e.g., complaining, criticism). 2. The technique of 'gray rocking' or becoming uninteresting to a negative person. 3. Strategies for setting firm boundaries with kindness. 4. The importance of curating your social circle. Please include a supportive disclaimer.