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Marriage. I learn how to solve problems with partner together everyday, especially when we fight.

I would not be able to tell you the most important decision in my life as I just reach half of an avg lifespan. Perhaps, If I make it large the answer would be there in my biography. But so far I have made many dumb choices and many mistakes. And stating that I have learned a lot from them would be a lie. But I can tell you all one thing that I have learned is "Whatever problem you are facing now is temporary."
Time will pass and eventually you've to make a decision. Because Time is such a thing, In case even if you don't want to make a decision it will force you to it. And later down the line you will look back and think "well that was a waste of time". I very well know that there will be moments where you are very indecisive or you will be thinking too much about how to go further on. My advice to you is relax, calm down and weigh your option. chose one and don't look back. Because the worse you can do to yourself is asking "what if"?

regards @inuke
Greetings from India

That's when I started to follow bible principles.

My most important life decision was getting married.

My most important life lesson: Money is meant to be spent, albeit judiciously. There is no guarantee that you will be the one to spend the money you are hoarding.

Finding my passions.

Anything in world is possible nothing is impossible here and what your heart says do it take your own decision in life as life will not give a other chance to get success and opportunity is given once and grab the opportunity otherwise you will loss the train and simply regret.
This was the lesson i was taught and i daily get motivation from this.

Often life rewards us when we have to make decisions that are not easy. To take a step, we consider many considerations: self-efficacy, financial condition, family and people around, health and age, time, benefits that may be achieved, and many others.

We may think these things may hamper our future, but the real obstacles that are primarily in our own minds.

Many people are married, and couples are the most important thing in their lives. And concentrating on the aspect, it does seem right and natural in the brotherhood.

focusing on one of these aspects tends to be ineffective.
In this article, it will show you what the reason is. And besides that, it will also show you what should be in a person's life this is very important in life, whether it is social or anything else.