Definitely down and tidied away. As others have said, remove framed pictures, knick naks etc. If you have a pet remove half eaten food etc. I have sold four houses quickly for the price I was happy with by decluttering, getting rid of lots of coats on hooks by front door etc (temporarily house in garage if need be). Too much 'stuff' doesn't look homely it just makes your house look too small. I even bought 2 or 3 new towels that were purely for dressing the bathroom & not for use! Removed the stash of assorted products in bathroom too, always made sure beds were made, try wiping a tiny amount of vanilla essence onto a table lamp bulb & switch on before viewers arrive. Keep kitchen surfaces decluttered & clean - you are selling an image. I even had an enamel stove top coffee pot which had a batch of real coffee in it just reheated prior to viewings, the agent told me so many commented on the homely feel to the house. I also polished my dining table with lavender polish. Because I'd already moved out of my last house prior to selling I paid for a small local cleaning firm to come in and give it a thorough clean, we'd already shampooed the carpets. I was surprised what a good job was done for less than I'd budgeted for, my aching back was grateful too & it really took the pressure off and it paid dividends in the long run. We returned to mow grass/water plants until we exchanged.