A cumulation of small managerial stupidities will produce a major stupidity — not a major triumph. - Warren Buffett

If you aren't thinking about owning a stock for ten years, don't even think about owning it for ten minutes.

If you are investing in your education and you are learning, you should do that as early as you possibly can, because then it will have time to compound over the longest period.

And that the things you do learn and invest in should be knowledge that is cumulative, so that the knowledge builds on itself.

So instead of learning something that might become obsolete tomorrow, like some particular type of software [that no one even uses two years later], choose things that will make you smarter in 10 or 20 years.

Mrs. B’s story is well-known but worth telling again. She came to the United States 77 years ago, unable to speak English and devoid of formal schooling. In 1937, she founded the Nebraska Furniture Mart with $500. Last year the store had sales of $200 million, a larger amount by far than that recorded by any other home furnishings store in the United States. Our part in all of this began ten years ago when Mrs. B sold control of the business to Berkshire Hathaway, a deal we completed without obtaining audited financial statements, checking real estate records, or getting any warranties. In short, her word was good enough for us. Naturally, I was delighted to attend Mrs. B’s birthday party. After all, she’s promised to attend my 100th.