Do not venture into less travelled paths or unknown territory such as remote jungles. You might risk stumbling upon UXO. As you might know Laos was heavily bombed by the Americans during the Indochina war from 1964-1973. Although the UXO have been cleared from most major tourist destinations, there are still very many “un-cleared” areas in many provinces of Laos.
When in Laos, always conduct yourself within the bounds of its law. Offences such as dealing drugs, rape or treason can incur the death sentences. There are also heavy penalties for drug possession and use, so if offered drugs by locals, such as opium, do not buy it or use it as you may be reported to the police by the seller.
Always carry your passport if you're a tourist or an ID card if you're living here in Laos. Tourists are seldom checked, but you never know when the police will approach you. If you fail to provide your identification you risk running into troubles.
Carry your driving licence if you drive.
Always wear helmets when riding motorcycles or bikes, traffic sense is not that great in this country and there are a lot of accidents.
Avoid traveling on the roads during holiday periods such as Lao New Year
Don't go wandering aimlessly alone through a town or city late at night
Avoid back streets when commuting at night as most of them are dark, and are often places that muggers focus on.
Put your valuables such as money, credit card and your passport in a money pouch and keep it concealed under your clothing.
If you are riding a bicycle do not put valuable items in your basket, there have been incidences of drive-by theft. Make sure they are on your person.