FlyLady's Crisis Cleaning pod cast thingy is good. It takes you through the main areas that a guest would see in one hour. She splits it up into 15 minute segments (Kitchen, Living room, Bathroom, Rest), and divides those into 3 minute segments.
She is so cute with her accent, giving lots of encouragement (she annoyed DD though ).
You can do it! I've been there, and it's such a better feeling knowing that someone can stop by and I won't be totally humiliated!