How do you keep your feet from getting dirty?

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We have tile floors in our house, so any dirt or dust on the floors tend to stick to the soles of the feet. And, though I sweep and mop the floors constantly, there seems to be no getting away from the dirt. I was wondering if anyone else has this problem with their tile floors. How do you keep the bottoms of your feet from picking up dirt and dust? Mostly, I'm concerned because it doesn't look good. And, it's tough to keep the dirt off the couch and beds once it gets on the feet. Does anyone have any solutions for keeping the dirt off the soles of the feet? Or, perhaps a more effective solution for getting the dirt off of tile floors. Simply sweeping doesn't seem to be working anymore! I would appreciate any suggestions or ideas. Thanks!