Buy candles that are going to fit into colour theme you have chosen.
Use cloth napkins and napkin rings (can be store bought or home made). This shows dinner guests that you care about them and care about the details.
If it is for Christmas and you are into using Christmas ornaments, adorn the table with them. Easy! Hallowe’en? Buy a handful of ornamental gourds and present them in a bowl on the table. Add some colourful leaves (real or not) and you have a wonderful table.
Whatever the festivity, take a few moments to plan it all out and it will work out and everyone will enjoy what you have done…..for them!