A number one tip for positivity that helped me already a lot during the first days of the new year:
Don't criticize when you don't have a solution at hand!
This means that you either should not come up with critics when you would know a solution but don't know a person who has time and the know-how to implement the solution! When you don't have a solution that can be implemented NOW, then probably things are currently in that awful state because no better solution available yet. Just search for a solution and solve the problem yourself or be patient and accept that the world is not perfect!
Further, you should keep in mind to never criticize a person as a whole - just criticize a specific behavior or a particular strategy!
Related posts: An eye for an eye, Spam critics, Positivity barricades, Success with optimism AND pessimism, There are no problems, How to be happy, The power of intention.