When serving a sit-down dinner, a pound of pasta will serve 4 as an entree or 6 as an appetizer.
For a buffet, a pound or pasta will serve 8-12, since people are likely to fill their plates with all of the other food.
If serving your pasta buffet style, be sure to have small cards identifying each dish.
Make entertaining hassle-free by setting the table way ahead of time - it will clear out some kitchen clutter and you won't be rushing right before the guests arrive.
Consider setting up a spread of antipasti for your guests to keep them nibbling while you finish any last-minute cooking.
Try making a larger, family-size pasta dish (like lasagna or mac & cheese) a day ahead and reheat it before the party starts. It will save time on game-day, so you can relax with your guests or even entertain on a weeknight.