As of my last update in September 2021, the best earning methods in the USA can vary based on individual skills, interests, and resources. However, some of the popular and potentially lucrative methods included:


1. **Employment**: Traditional employment remains one of the most common ways to earn a steady income. The USA has a diverse job market offering opportunities in various industries and professions.


2. **Investing**: Investing in stocks, real estate, or other assets can generate passive income and potential long-term wealth. However, investing carries inherent risks and requires a good understanding of the market.


3. **Entrepreneurship**: Starting a business allows you to leverage your skills and passions to create products or services. Successful entrepreneurs can achieve substantial earnings.


4. **Freelancing or Consulting**: If you have specialized skills in areas such as graphic design, writing, programming, marketing, or consulting, you can offer your services on a freelance basis and earn money on a per-project basis.


5. **Online Content Creation**: With the rise of social media, YouTube, and other digital platforms, content creators can earn through advertising, brand partnerships, sponsorships, and merchandise sales.


Please note that the landscape might have changed since my last update, and new opportunities may have emerged. It's essential to research the latest trends and opportunities to find the best earning method suitable for your circumstances and goals. Additionally, consider seeking professional advice and conducting thorough research before pursuing any income-generating endeavor.