Are you driving a rental car? If so check your rental contract - most companies do not insure on the beach.
Check the tide timetable. Travel the beach 3 hours after the high tide.
Do you have enough petrol?
Slow down and engage a lower gear for streams flowing across the beach.
Either follow the buses or the tracks created by the buses.
It is not advisable to leave a vehicle unattended on the beach.
Avoid the beach at night.
If you are unfortunate enough to get stuck, here are some things that you can do to help yourself.
In loose dry sand, try reversing out in the tracks made going in and then look for a new route around problem area.
If unable to reverse out, remove the piled up sand from in front of the wheels and try to drive fowards.
Sand with a layer of water is very hazardous and usually requires assistance.