What are various techniques for tying down your boat when you store it at a beach or club or marina on a permanent or seasonal basis?

And what are techniques for tying down your boat on an emergency basis when you are at a regatta or camping and a sudden storm comes through?

Related questions are:
*How do you deal with different surfaces -- like concrete/asphalt, normal soil, rocky soil, and sand?
*Is it better to tie down with the boat on the trailer, on beach wheels, or flat on the ground?
*In relation to the expected direction of high winds, do you want bows facing toward the wind or sterns facing the wind or the side facing the wind?
*If your boat is on beach wheels, do you want them under the boat at the end away from the wind direction? Or do you want to put them on top of the boat at the end closest to the wind direction to help hold the boat down?
*How do you deal with your mast? If your boat is turned bow toward the wind, do you leave the mast loose to feather at will; and, if stern to the wind, do you secure the mast so it won't go sideways to the wind?

I know sand anchors sound like a good idea that people could carry in their boat box to regattas or even on their boat if they are going camping on an island. But what kinds are good and where do you get them? I found a type of sand anchor that is used for beach umbrellas, but it is only a foot long. A guy who sails a lot at a very windy lake in the western United States said the sailors all have spiral sand anchors that are 3 feet long, but where do you find these?

This is becoming a bigger issue as boats get lighter. We have a lot of A-Class boats sailing out of here and sometimes leaving their boats here for periods of time. As y'all probably know, an A-Class weighs 165 pounds all up. When they are going to leave their boats on the water side of our place, they usually drop their masts, because they are concerned about their boats taking flight when a cold front comes through and winds are 25-30+ knots blowing directly in on our beach.

I asked one of the A sailors if it would work to tie the boats down to weights, like concrete blocks, and he said, "No, it would still go flying and at the same time flinging the blocks around and damaging the boat."

Between the Tradewinds Regatta and the A-Class Regatta the following weekend, four A-Class boats were in our yard with masts up. Sure enough, a cold front came through during the week. They were all sitting stern to the wind on their square, four-wheel dollies, which lets the wind get underneath the whole boat. They were bouncing around pretty good, and one briefly tried to stand up on its nose, and I was picturing one of them ending up in my office. I moved the dollies forward, to let the sterns down on the ground so the wind would not be able to get underneath the boats as easily, but they were still dancing.

Fortunately, Goran Marstrom came to my rescue. He was staying here for Tradewinds and the following A-Class regatta. (Marstrom is the guy who has the factory in Sweden that makes the Tornados of choice, and he also makes A-Class cats.) He and Bob Webbon, another A-Class sailor, gave me a lesson in physics. They put all the A-Cats back on their dollies and they took the trapeze wires from each and added lines to them and tied the the lines down to our chickee hut on one side and to trees and other things on the other. I didn't understand the concept, but Webbon said, "It's about levers and fulcrums." I was dubious, but it worked like a charm. The boats did not budge after that, no matter how strong the winds got. How incredibly simple! (IF you have something to tie to.)