Do remember the following things:

1. Always be respectful

Continuously be deferential towards local people, priests or Buddha images. You can wind up in prison on the off chance that you take a stab at being insolent towards Buddha pictures as they are sacrosanct in Thailand.

2. Dress in a proper way

I know, it's hot and humid. Especially, for women, you would rather walk with your shorts and tank tops. However, that is not a very good idea if you are planning to visit temples or sacred places. At the very least, try to cover your knees and shoulders. Remember, this simple act shows that you respect the culture of the country.

3. Do lower your body slightly

It is again having to do with being respectful. As you can see respect is a huge thing in most Asian countries.

4. Do take off your shoes

Don't forget to take off your shoes when you are entering someone's house or building which has a Buddha image within.

5. Try to learn some of the basic phrases at least

It won't be that hard to know how to say hello. Men say "Sawatdee-krap" and women say "Sawatdee-kah". Try to recognize the "wai" gesture. You as a foreigner are not expected to initiate the "wai" gesture, but if someone offers it first to you, try to return it back. However, never return a "wai" to a child, waiter, clerk, etc. Simply nod and smile in response.

The followings are not advisable in Thailand:

1. Never be disrespectful

Do not show any disrespect towards the locals, the royal family, monks, just never towards anybody.

2. Never try to touch the head

It is a very disrespectful act, even if you mean it as a joke. Head is sacred in Thailand.

3. Never cross your legs

Especially in front of elderly or monks do not cross your legs. It applies whether you are sitting on the floor or in a chair.

4. Never pass anything with your left hand

Also, never point with your hand and never, never with one finger.

5. Try not to be so affectionate in Public

It is a taboo to touch the opposite sex in Public. Please refrain yourself from being too intimate or affectionate towards your partner in public.

6. Do not, I repeat, do not touch a woman publicly without her consent

As I have mentioned before, touching the opposite sex *is still a taboo in Thailand. A lot of people in Thailand still believe that a woman can lose her face if she is being touched publicly.

7. Don't take Buddha images out of the country

Unless you get special permission, it is strictly against the law to bring Buddha images out of the country. Of course, you can easily buy them there, but try to avoid unnecessary problem.

However, these are only some general things that you need to be aware of when you are in Thailand. I hope these do's and don'ts can help you in some ways. Enjoy your stay in Thailand.