Where exactly will you be flying from and how long will your flight last? Do you often have jet lag and that is why you always have such a hard time with it? I always somehow manage to cope with it and try to fall asleep according to the time of the country I arrived in. As for the Sri Lanka airport transfer, I ordered it on the GetTransfer website, as soon as I bought the plane tickets and knew the exact time of my arrival in Sri Lanka. A driver met me at the airport and took me to the car, and we went to the hotel. Did you book a hotel near the airport?