I am assuming round pan here but the square pans will do this too
On the finer of the oversize - 8 or 12 mesh.
Tilt the pan to one side and shake everything down into the "corner".
This is gonna be hard to explain -
Lay the pan on your forearm (wear a shirt or your arm will take some punishment).
The side with the material in it is away from you.
The top edge of the pan that is away from you should be just at your hand in a way that you can just curl your hand and your fingers will go over the edge to secure the pan.
As you grasp the pan this way the pan's bottom will lift away from your arm - thats a good thing.
Holding tightly like that you take your other hand and smack your lower palm against the edge closest to you.
You start a rythmic bumping action with the free hand and play with the angle a bit with your other and you will see the material on the far side trying to "walk" up the pan towards the bumping hand. Try to keep the pan held pretty rigid so your supporting arm and hand are like a stiff spring. Some experience and practice with this action and you will be able to control the material so that the heaviest stuff works its way to the bottom of the pile and then once it hits the bottom of the pan it will work its way to the edge of the pile closest to your bumping hand. Keep the pan tilted so that nothing comes walking all the way up but just sort of hovers on that upper edge. You will see the character of the pile change as the heavies build up and at a point in the proceedings you tilt the pan down just enough that some of the heavies start to walk almost to the top edge where you are bumping. Watch for gold walking along at that point. The material walks up and then sort of falls away back to the leading edge in a circulating layer of heavies.
Work with less than 1/4 of a pan of material so you have enough room to see things happening and to get a good action going. If you see a piece of gold the nice thing is that you can freeze everything right where it is by stopping the bumping so you can reach in with the bumping hand and pick that little golden prize out.
Once you get really cocky you can further work it down by setting up the bed as discussed and slowly tilting the far edge down so that some material is going over the edge as you bump. As long as you have first established that edge of heavies towards the bumping side your gold should be safe on the good side or buried in the pile so that you can let some material get away.
Don't be too quick to start dumping stuff as you should be able to do most of the gold recovery right in the pan. I usually do the tilt to dump process after I am pretty sure that I have all the gold and more as a final hurrah before dumping it all. A last check never hurts so preserving the heavies as you tilt off the lighter stuff can only help.
Once you have reduced that last stuff to just a few spoonfuls tip the pan back and some careful bumping should bring the heavies up again and spread everything out to get a good look - just in case.
If you have gotten a little too ambitious with loading the pan you can use the tipping earlier in the process to reduce the volume before you start the serious recovery effort in the pan but be sure to really give stuff a good shaking down and only a thin layer over the edge as you tip. Keep up the bumping all along the way.
This technique works pretty darn good when you get the hang of it. Best to use on classified material as the material in the 12 mesh and up will not glue together as easily with a bit of damp like the fines will.
It is hard on the back and wrist and the palm of your bumping hand - especially at first till you learn not to put too much in the pan and not to get all fired ambitious in smacking the pan with the tender parts of your hand. Just a gentle thudding bump is all you need. It should not be smack smack smack but more a dull thud thud thud.
After over 40 years of martial arts my hands can take some beating but an hour of this and it will take its toll.
Keep it up over a prolonged period and you will start to look like Popeye!