When you arrive in Colombo airport it is a good idea to purchase a sri lankan sim card rs130 if you plan to make any calls. Usually if you find a good tuk tuk driver or you have a guide you will want to make calls at a local rate rs2p/m. You can also then utilize the IDD Rates UK Rs15 or fixed rate less (Dial #107# from dialog mobile) Also as Sri Lanka has a habit of having random and frequent power cuts 3G access is more reliable on your smart phone then relying solely on wifi access. Valid for 30 days there are also a few IDD packages available
BIA Arrival lounge / Odel / Crescat
In most of Sri Lanka there is a 10% service charge added to the Restaurant Bill, sometimes also to the Room charges.
In a majority of smaller establishments the employees do not get the service charge passed down from their boss which is perhaps why some staff lack the motivation & drive. No matter what the policies are of an establishment a certain amount will be retained for breakages etc.
A small tip goes a long way this is often put in a kitty and divided amongst the staff. It is customary to tip a tour guide especially if they go beyond the job of just being a driver. Also if you go to a doctor or dentist they may charge you a minimum amount as healthcare is generally free these people do not earn fantastic salaries.
It is however not necessary to tip everyone who sticks their paw out be careful about this especially at the cultural sites.
Sri Lankan's will often give small money to those less fortunate begging in the street or on the train or buy a scratch card from a blind man.
Roads can be very dangerous !
three weelers are not safe, if you take one at least take a good looking one! the maintanance can be very bad and the can just lose a weel while driving !!!
taxi is not expensive.
the Bigger the car the Better!