Thailand is indeed a beautiful place. The people are friendly and the cost of living is very affordable. You can definitely go around and suit yourself with the variety of amusement and services they offer. But don't forget that Thailand has some strict social rules that everybody should respect. To help you enjoy as much as possible without getting yourself into trouble, here are some helpful reminders about Thailand's social rules.
1. The first thing that you have to bear in mind is taking off your shoes when entering a temple or a house.
2. Never point things or direction with your feet. This is very rude and impolite. You may get into a fight just by giving your hands some rest and using your feet instead.
3. Never touch somebody else's head. This is also a sign of disrespect or belittling the person.
4. Respect the people's religion. Do not laugh, not even smile, when you see people doing some unusual religious gestures. You may not know which is religious sometimes so you'd better watch out.
5. Don't talk about the Royal family, especially the king. Thais revere their king so much that will be very offended when you comment on him. Don't even joke about him nor speak anything about him. You may say something that will upset them.
6. Thai culture is very conservative. Don't wear provocative clothes and keep your flesh private no matter how the weather becomes. You may wear less conservative clothes in the beaches where rules and expectations are so much less and free.
7. Don't raise your voice and always be calm. Thais don't normally go mad and shout when they're upset. As much as possible, keep your anger to yourself and try to talk things out smoothly.
When you familiarize yourself with these rules, you may keep them and enjoy your vacation.