The simple choices we make will not only determine how happy we are but also how happy our friends and families are. Think about it.
The one that hit me as being the most important is "What others think of you is none of your business." How many relationships have been damaged because one of the people demanded to know that the other(s) really thought of them. Honestly, in the end we are what we are. There really is no one that can or will change all that much. All we can ever be is the best "us" that we can be. No more and no less. We need to make peace with that and find a way to live alongside others.
How many times have I told friends to stop "thinking so much"? Lot and lots! They only make their pain or situation worse and nothing is gained. While the answer will come, it is what we do while we are waiting that in so important. Leave the door open in your mind and above all, think of all the things you are grateful for in that moment.
So smile, wait, let go, leave judgement behind and be at peace. Good advice for a Sunday morning.