I ,also, look for over sized plates on sale to use for platters. Baskets Baskets are handy for lots of different things. Use them to hold the napkins or silverware for a buffet. Put a dish towel in them and they can hold bread, chips, raw vegetables, crackers, sandwiches, etc. Best of all, you don't have to wash the baskets after the party.
Glasses Try to buy glasses that are versatile.
A goblet works best for wines, tea, water, or ice cream. Or try to get glasses that stack for easy storage. I, also, keep some plastic cups for the smaller kids. Drink Pitchers Save an assortment of items to hold drinks. You can recycle different items that you already have like milk jugs, wine bottles or juice bottles.