Shoes-off house, hardwood throughout, 2 children, no pets:
1. I sweep every day under the dining table (crumbs) and 2-3 times a week in high-traffic areas (kitchen, entryway, etc).
2. Vacuum once every week or 2 weeks, with or without mopping.
I wish I mopped more often - it does make a difference.
I stay home, so it gets done when I think about it