There's no secret.

1. Have a job with good salary.
2. Don't save, instead of invest your money.
3. Avoid spend your money for unnecessary thing e.g. expensive food, cloth, entertain etc.

That's all, I'm sure the next 10-20 years you will become rich.

The reason why many people can't become rich are because they can't follow the three requirements I mentioned above. Most of people work in low or minimum salary job, most of people can't take risk, most of people want to impress other people and want to entertain themselves.