I've used Blue Dots, Blu Tak, and Herbies Big Fat Dots between speakers and Sound Anchors stands and my preference was for the Herbies Big Fat Dots.
The Blue Dots come with the stands, Blu Tak can be found as Dap Blue Stik at most hardware or stationery stores under $2.00, and Herbies Big Fat Dots come with a money back guaranty, so why not try all three and see which you like the best?