Gingko Isolation platforms

If you want to optimize the Gingko idea then be sure to check out Herbie's Audio Lab website where the replacement "Medicinball" is made available to do even better than the Gingko originals. Also, a wealth of other effective support ideas are on this site.

Meanwhile, the art of isolation has moved on to ever newer options, including one from Machina Dynamica that may well provide the best benefit at an affordable cost. This is what I currently use under my tube and solid state components, as well as beneath the wood platform supporting my turntable.
Quite impressive.

Good isolation enables the potential of a component to emerge at its best, and there are many ideas and controversies regarding how to reduce negative effects of vibrations (great and small) upon components and the listening environment.

If you wish to use your existing furniture shelves then take a look at the VibraBlock Damper from Machina Dynamica which can be placed on any shelf or horizontal support surface to provide excellent reduction of vibration even if you don't choose special footer support under each individual component or your turntable.
I use these with great results in more than one system, even to augment the benefits of already installed special footers.
As mentioned above by Chayro, there is the personal preference of each set of ears that must be satisfied.
Overall, you probably will be pleasantly surprised that an item from any one of the vendors mentioned in this thread is going to sound significantly better than what you are accustomed to hearing.