What cities can we visit for a tourist visa extension from Thailand, and how long should we stay outside Thailand?

Travelers looking to extend their tourist visa for Thailand can consider cities with Thai embassies or consulates in Myanmar and Malaysia. Specifically, they can apply for a new tourist visa at the Thai embassy in Yangon, Myanmar, or at the consulate in Penang or the embassy in Kuala Lumpur, Malaysia. It's recommended to stay at least one night outside of Thailand to apply for the visa; however, there is no specific minimum stay required to avoid issues with border runs.