To avoid common pitfalls when forming a US business entity, keep these tips in mind:

1. Choose the right structure: Understand the differences between an LLC, C Corp, and S Corp to select the best fit for your business needs, especially regarding taxes and ownership.
2. Ensure eligibility for a US bank account: Confirm that you are from a country that is eligible to open a bank account in the US.
3. Register in the right state: Some states offer better benefits for certain types of businesses. For instance, Delaware and Wyoming are popular for their business-friendly laws and lower fees.
4. Keep personal and business finances separate: This helps maintain liability protection and simplifies accounting.
5. Understand compliance requirements: Stay on top of annual reports, tax filings, and other legal obligations to avoid penalties.