Brand new hundred dollar bills for exchange. Worn, marked or folded bills are typically rejected by money exchangers. Bring HALF the amount of clothing you would typically bring (clothes are CHEAP). Also, good walking shoes and smile will get you almost anywhere.
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.