How can one ensure long-term residency in Thailand"?

To ensure long-term residency in Thailand, one can apply for a non-immigrant visa, such as a retirement visa or a marriage visa, and meet the specific requirements set by the Thai government. Additionally, one can consider investing in Thailand through the Thailand Elite Visa program, which offers long-term residency options for those who meet the investment criteria. It is important to comply with Thai Immigration laws and regulations to maintain long-term residency status in the country.