Depending on the time you have to hunt......
I would start where the greatest concentration of people are and then move out from there. If the beach is hit by other detectorists you will have to be creative. For example at some spots that I go to that are bombarded with ace 250s in the dry and excaliburs in the water, I have to go to deeper water where the others couldn't reach. It helps being a little bit taller than the average. But that's only if you have a water proof machine.
I have seen hunters find rings and other pieces of jewelry at all parts of the beach, even near the garbage cans. When we went over to the Treasure Coast one time to try our luck there was a hunter that only detected the parking lots. He wasn't doing too bad. We had a total of 3 cents between 3 hunters, he had several dollars in clad. He also told me on several occasions he had found gold.
I would concentrate when the tide is low in the zones that had been under water. You might be surprised....
Another word of advice that might help, if other hunters hit the same area but go through quickly, try going over the same areas slower. I have hunted in areas where you could see the holes from the other hunters but yet I was still digging quarters near their holes. I also found one of my best rings where a hunter had just passed through with one of those WOT coils. He may have heard it but thought it was junk because there were also pulltabs all around it. I guess it's impossible to get it all.