Scattering faux gems, diamonds, wedding bells or cut outs over the table cloth and around the centerpiece on each table adds to the effect of the decoration without adding a great deal of cost. Use these sparingly and be careful if children are present as they can pose a choking hazard.
To be able to determine exactly what your decoration will look like, actually set a table or set up the decoration in a room and see what the total appearance is well before the wedding. Sometimes what seems to work well together in theory is not as elegant when actually presented, so this test run will allow you to make any necessary last minute adjustments to the decorations.