Bargaining/haggling
While bargaining is common in Laos - in the market or in negotiating a trip on a saamlor or tuk-tuk, for example - it is not heavy-duty haggling. The Lao are extremely laid back and it is rare to be fleeced; don't bargain hard with them, it may force them to lose face and reduce prices well below their profit margin. For most things, you won't even really need to bargain. Approach bargaining with a sense of fun; a smile or joke always helps.