1. Apply for a student visa of F 1, continue your studies, and legally stay in the United States (but you don't want to study any more, this pass).
2. Find a company to hire you, and then take part in the lucky draw of H 1B work visa. If you win, you can work in the United States for a long time (the winning rate is relatively low).
3. Have immediate family members in the United States; Or marry an American (on the premise of love, or carefully)
4. Visa B 1/B2, business or tourism (only short-term stay, unable to work, leaving the country at the expiration. The same is true for visa J 1).
5. Direct immigration (if economic conditions permit)
The above methods are common and legal. Of course, there are many other methods, such as political asylum, refugees, L 1 to EB 1C, or hackers. . . But according to my years of experience, the success rate is too low, so it is not recommended.
Of course, it depends on your actual situation before you can recommend the one that suits you best.