DO expect men to primarily conduct business, although women are beginning to get more involved in Thailand's business world.
DON'T rush negotiations. Business decision-making can be slow in Thailand.
DO be subtle. Directness doesn't always go over well.
DO expect to be addressed by your title and first name, i.e. Mr. Bob. This isn't to be rude or disrespectful.
DO introduce colleagues of a lower professional status before introducing yourself in a formal business introduction.