Everyone's path to success is different. For some, it's mostly straight and smooth. Others meet more twists, turns, and bumps along the way. So what were highly successful people doing at age 25? 1. President Trump took over his father's real-estate-development( 房地产开发 ) company. Before becoming the leader of the United States, Donald Trump, was born into a real-estate development family and took over his father's business at 25. Shortly after that he took part in large, profitable building projects in Manhattan. 2. Apple cofounder Steve Jobs took his company public and became a millionaire. By the end of its first day of trading, in December 1980, Apple Computer had a market value of $1.2 billion. All of its cofounders became rich. Jobs, one of the three cofounders, was 25. He later told people that at that time he had decided to never let money ruin his life. 3. Author J.K. Rowling came up with the idea for the Harry Potter series on a train. Rowling was 25 when she came up with the idea for "Harry Potter" during a delayed four-hour train ride in 1990. She started writing the first book that evening, but it took her years to finish it. While working as a secretary, Rowling was fired for daydreaming too much about "Harry Potter". The money she got from quitting her job helped her focus on writing for the next few years. During these years, she got married, had a daughter, got divorced, and was diagnosed with depression before finally finishing the book in 1995. It was published in 1997.