Bartering
Bargaining and haggling are crucial for an economical trip, especially when you have no idea what is exactly the price of products. This is among the top Things to Know before Travelling to Cambodia if you don't want to be overcharged. Practice your haggling abilities because the cost is negotiable unless there is a price tag. Because you're a tourist, expect to pay inflated prices, but never agree on the first price because it will be at least doubled.
Walking away from them often works because they'll call you back; if they don't, you've pushed them too far. Remember to agree on tuk tuk and motorcycle fares before getting in to prevent being overcharged when you attempt to get out.