I have always had a fetish about bathrooms and kitchen. I had 2 sons and a husband who were all slobs especially the bathroom. I cleaned it daily and even now that its just myself and DH I still take a lysol/bleach wipe every morning and wipe down everything. we pick up after ourselves.so nothing gets too out of control.
My main living room never gets used and that is where the front door is so I dont get freaked out if someone comes that it might not be company ready.
All in all we only use 1 bedroom,family room, kitchen and bath. I think the main thing is keeping clutter under control, I dont have anything out on my counter tops either except a coffee maker and a TV.