It is extremely important not to try to squash too much into the timetable. Extra time must be allowed for getting into the cars, traveling at the speed limits, that one extra photo that turns into many photos, and many other little things that can cause delays.
The Timetable...
A good idea is to plan your arrival at the church for 5 minutes before the scheduled service time. By the time the cars have been parked, photos taken of everyone getting out of the cars one by one, the dress arranged, the nerves settled, lined up at the end of the aisle, it will soon be 5 minutes past the start time before you know it. So at 5 minutes before your service you have arrived and made the minister very happy and at 5 minutes past you have satisfied the belief that brides are supposed to be late!!!
A few extra tips...
Do have something light to eat on the day. A sandwich is a good idea, as it can be eaten on the run. By not eating anything, then swallowing a few glasses of champagne after the church you will most likely become very light-headed or even worse.
However, be wary of indulging in nibbles during the photos as you are likely to get your fingers messy with nowhere to wash your hands.
Choose photographic locations that are a practical distance from the service and reception. A convoy of cars takes longer to get somewhere and keep in mind any parking difficulties or long walks because the cars do not have close access.
Even the best behaved small children become very tired and uncooperative as the day wears on. Make sure there is someone familiar (preferably not from the bridal party) to look after them, with one or two hidden small toys to rescue a crying situation!