Depending on the details of your situation Townshend Pods, or Platform.
If the turntable is fairly massive (like 20lbs or more) sometimes Pods can be used directly under the table. This is the best relatively inexpensive solution. (Nobsound springs are the budget answer.)
If the table is light, or if it uses an outboard motor like mine then you would put it on a shelf or sand box with Pods under that.
Townshend Platform, which basically is Pods attached to a constrained layer damped platform. Costs more than Pods but the performance is a little better too owing to the constrained layer damped platform.
My table is on a BDR Source Shelf and very massive so I use Pods under the Shelf. You can do this with a butcher block shelf or sand box or whatever. All of these options are a more performance for a lot less money than alternatives. The main question is which one will work best in your situation.