>>82850217
1. Go to uni and get a job that society considers valuable so they pay you above average for it; bonus points if it involves mostly sitting on your ass
2. Same as #1 but with a career that people would consider a trade (i.e. anything that pays well but unfortunately involves manual labor)
3. Military

The secret 4th option is entrepreneurial stuff like authoring a best-selling novel series, becoming a famous YouTuber, starting your own business, inventing something, etc. but success with that route is usually reserved for people who have both talent and a lot of luck.