Maybe you can't afford to fly across the country and stay in a nice hotel, but who's to say you can't have a nice hotel weekend in your hometown? It might sound silly, but it's actually quite relaxing. Pack up the family and check into a local hotel for the weekend. Many hotels now offer "staycation specials," so make sure you ask.
Get a hotel with a pool or spa. The kids will love it. And take some time for yourself to get a well-deserved massage or beauty treatment. Think about a local day trip, and enjoy coming back to a clean and tidy room that evening. Tuck everyone into bed with a movie, and wake up the next morning feeling refreshed and renewed.