"The best is yet to come" truly involves just making life good on your own. While it is something that you may look at as just happening, it is inevitably true for most people because they are able to make it that way.
In life, what happens each day is a result of our own actions and the world around us. If we choose to go for things and make the best of each day, then that is exactly what will happen.
"The best is yet to come", in my opinion, is intended to motivate us to be better and do better each and every day.
This statement is still relevant and around for a reason because people are able to make the most of situations if they try.
All in all, I urge you to realize that "the best is yet to come" is very much what you make it out to be and that you will get the best results out of life if you put this cliche into your routine and embed it in a sense into your brain.
I think it is so important that people realize how true this is because we are the ones capable of creating what is to come.
We can look at a negative situation and choose to learn from it, but whether we do so or not is completely our own call. We should strive to live each day to the absolute fullest of our abilities and CREATE the best atmosphere possible.
Life is always our call and how we choose to live it is always up to us, and in my personal opinion, that is what this saying means.
With that being said, next time you hear the catchphrase, "the best is yet to come", I hope you hold it close to your heart and choose to take what you want from that.