Warren Buffett published his farewell letter to shareholders this week, ending one of the most remarkable runs in corporate history.

His leadership and reputation have been a key to Berkshire Hathaway’s success.

Shares of Berkshire were at an all-time high in May just before Buffett made his announcement.

Three months later, the stock was down 15% while the broad market soared. Keep in mind this before he even stepped down.

Buffett’s wisdom clearly matters, as it always has.

So today, I want to dig into his farewell letter for some final lessons from one of finance’s biggest success stories.

"Don't beat yourself up over past mistakes – learn at least a little from them and move on. It is never too late to improve. Get the right heroes and copy them."

Buffett is known more for investing. But this piece of advice is especially powerful for traders, especially in today’s market.

It’s important to understand that failure and losses are part of the process. The best processes accept this fact and move on quickly.

Sure, you should take a moment of reflection to see if there are any lessons to be learned. But focus on the next opportunity.

This is also great advice for life.

“Choose your heroes very carefully and then emulate them. You will never be perfect, but you can always be better."

Mentors, or “heroes,” are an important part of investing.

Each of us can learn from our own experience. But it’s important to also leverage the knowledge of others’ vast experience as well.

This is the most powerful method of improving in the markets.

It’s also the reason I write to you here to share my experience so you can improve your financial future.

"It's never too late to change."

Remember that we can always improve. This was also referenced in the previous quote.

Your skills as a trader and investor are a process, not an endpoint. That’s especially true since the markets constantly evolve.

Every day, think about how you could be better and how to make it happen.

"Greatness does not come about through accumulating great amounts of money, great amounts of publicity or great power in government. When you help someone in any of thousands of ways, you help the world. Kindness is costless but also priceless. Whether you are religious or not, it's hard to beat The Golden Rule as a guide to behavior."

"Keep in mind that the cleaning lady is as much a human being as the Chairman."

These two quotes both refer to the concept of how we treat other people and how it reflects on us.

What does this have to do with trading and investing? A lot, in my opinion.

A positive and optimistic mindset is a key to success in the markets.

Treating others with respect helps establish that mindset and will make you a better investor.

"Remember to thank America for maximizing your opportunities."

I think about this one every day.

In terms of affording people opportunities to change their future, the United States is the greatest country in human history.

There are plenty of areas where our country can do better, but it is by far the best.

Growing up poor and the child of an immigrant, this concept is particularly powerful to me.

Be grateful and think about how you can help others in their journey.

“Decide what you would like your obituary to say and live the life to deserve it."

This one is obviously on Buffett’s mind as a 95-year-old. He will have hundreds, maybe thousands, of obituaries written about him. Most of us will not.

My take on this is to think about the people around you and how you have impacted their lives.

Would their “personal obituary” of you reflect well on you? Were you a positive force in their lives? Did you help them with their journey?

This is one of my goals as a financial writer — to bring my experience and insight to help you.

As always, it is an honor and a privilege to be able to do this job. So thank you.