Inventory tableware. Dig out the good china, polish silver and press linens. Make sure you have enough plates, glasses, flatware and serveware to suit the food you plan to offer, and buy some inexpensive extras if necessary. You can set the table or arrange the buffet a day or two in advance (sans champagne flutes and other precarious breakables), then drape a lightweight sheet over it to keep dust off until party time. Order flowers. A week should be plenty of time for a florist to create the arrangements you want. DIY-ers can play with loose blooms and vases to come up with their own custom traditional flower arrangements or wonderfully wild bouquets. Make a playlist. Comb through your iTunes library or CD collection and compile songs that set the mood. If you feel as though your musical taste has gotten a little stale, browse and download some new tunes to shake things up.