Thailand

H:
When ordering food from stalls make sure you have bills in small denominations and ask how much something is and be clear about it BEFORE you order it.
Get comfortable ignoring and walking away from people or else you are going to be in for a lot of sales pitches (Christi: Sometimes, even people chasing you down the streets!).
Pay more for VIP services on buses and trains (C: Nevermind taking the trains! Apparently, we hear they are so shaky you can't get a good night' rest and they make too many stops.)

C:
-Always look for the Thai crowd. If you are standing in a line full of tourists, you are paying WAY too much

-Only get in taxis with meters. Make sure the meters are turned on as soon as you get in. Some taxi drivers will tell you that they're giving you a great '100 Baht' deal, or that they'll give you a 'great deal at the end of the ride'. Don't get in. Another taxi is only a car's length away.

-When in Krabi or Phuket, bargain at least down to 50% of the original asking price. They won't give it to you for anything less; anything more, you're being scammed.
In Bangkok, anywhere from 1/2 to 1/3 of the original price.

-Entrances that say "For Thais only"-- use them. No one checks or asks questions when you do-- even H, whom resembles not an inkling of what a Thai person should look like.

-Females: Clothing-- Don't wear red, especially in Phuket! Same for heels and short skirts, unless you want to be mistakenly identified as a prostitute.

-Bargain on EVERYTHING (only exceptions: Malls, Worldwide Hotels, Taxis). You can even bargain with some travel agencies, private drivers, guesthouses/private hotels, and especially tuk tuks! Everything in Thailand has a price tag, and almost everything is negotiable!

-"Split sides against Mom and Dad"--
Tell one travel agent that "another agent down the road quoted you half the price", and see if they'll match that or better. With such a high rate of competition, they all want business from YOU.
Tell the salesperson that "Yesterday, your friend paid half the price" for the same item, etc,etc. If they're not willing to budge, walk away and see what happens. If they still aren't willing to budge after that, ask yourself if you really want the product, then make a decision.