There have been a few threads by newbies seeking general advice towards safety, security and freedom from hassle.
Though this list is far from definitive, it is real and hopefully will save the ass of some newbie, or inbred expat that's been here long enough to know better:
01 - DO NOT believe everything you are told. Thais will bullshit you for an extra few baht, but farangs will play with your head for the pot.
02 - DO NOT eat from food vendors, unless you have a stable metabolism.
03 - DO NOT take drugs, or break any law. You are a guest, perhaps a wealthy one, but a guest nonetheless.
04 - DO NOT display wealth on your person.
05 - DO NOT get drunk if you are alone, since this leaves you open to exploitation.
06 - DO NOT even in jest offend Thais, Thailand, Buddha, Royalty or your fellow man. There's enough shit going down in your home country, which is perhaps why you're here in the first place, and if it goes down so will you.
07 - DO NOT venture alone in unfamiliar territory or off the main drags after dark, and certainly not drunk, drugged and emblazoned with gold, having offended Thais, Thailand, Buddha, Royalty and a bunch of assorted farangs.
08 - DO NOT give the bahtbus driver 10 baht and expect 5 back.
09 - DO NOT pay the opening price on any negotiable goods or services, or assume you are getting what you paid for.
10 - DO NOT make plans and expect to keep them, or expect others to.
11 - DO NOT use plastic cards to pay the tailor, or other goods/service providers. Though you are not responsible for any subsequent abuse of that facility, it's a hassle you don't need.
12 - DO NOT tip out of some misguided obligation, or at a predominantly Thai venue. Tip only for good service, or to ensure good service. TIP (olde English, TEP) is an acronym for 'to insure promptness'.
13 - DO NOT grope or display public nudity, or provoke or encourage others into doing so.
14 - DO NOT be deflected by guilt when you come across that prettier girl.
15 - DO NOT assume you are God's gift to eternity simply because someone threw 'hansum man' in your direction. You're just another ugly fuck with money.
16 - DO NOT engage in conversation with street vendors unless you are or may be interested in their wares, or unless she is very sweet.
17 - DO NOT forget to check and keep a hardcopy of your rented motorbike's comprehensive insurance, even though it's not worth the paper it is forged on.
18 - DO NOT ride said bike like a maniac just because you can get away with it.
19 - DO NOT fall for the sick buffalo scam. Thai buffalos do not get sick.
20 - DO NOT take yourself too seriously, because nobody else will.
21 - DO leave your values at the airport of departure, and your valuables secure.
22 - DO avoid dealings with the police and government officials, which is good advice everywhere.
23 - DO retain your humanity, without going over the top and morphing into the stereotypical dumb farang.
24 - DO check in both directions before and whilst crossing any road, including and especially one way streets.
And remember:
25 - The king's image is on every currency note and coin, so treat them and yourself with respect.
26 - Thai road users do not care whether you live or die if they can arrive at their destination those three seconds sooner. You will be deemed to be at fault in any accident, since it would not have happened if you were not there.
27 - You are not in love; you only think you are, and it is her job to persuade you otherwise, though mine is the reality and her's the fantasy. Your choice.
28 - Be ready to brake or swerve instantly whilst on the road, especially following a songtaew; that 5 baht standing by the roadside is more important to him than your miserable farang life.
29 - A Thai one-way street means that drivers are allowed to drive only in one direction at any given time.
30 - You are here for fun, so get out there and have it.
Last but not least, and even in the face of adversity - SMILE!