I always go for dishes that can be prepared in advance - for starters I like to do antipasti selection - cold meats, olives, cheese, salad and good bread. looks great on the table as well IMHO.
Mains - at this time of year something like beef in beer or coq au vin would be nice, with dauphinose potatoes and a selection of veg.
Dessert - once again something prepare ahead would be better for your stress levels! You can' beat a nice pavlova, or maybe profiteroles. If I have time I do a fruit salad as well.
Don't forget the cheeseboard!
I make sure I have got all my serving dishes and cutlery out, try to be inventive when dressing the table (either matching or contrasting table linen, flowers and tealights), and do make sure that the lighting is suitable - candles and lamps create the mood, and can disguise things if your food doesn't turn out as expected on the plate!)
Oh, and of course - keep the wine flowing!