The number one way to improve the quality of your indoor air is to remove your shoes before entering your home. Think about it. All the toxins and crap (literally) that you track in on the bottom of your shoes eventually turns to dust and settles on everything you own and becomes inhaled and ingested. Gross.
It is now my habit to remove my shoes when I come home. I have to say though, that I hate walking around barefoot inside, especially since I live with a 4-year-old who is a fairly sloppy eater and a husband who is a fairly enthusiastic cook. The floor is often wet or sticky.
I searched for and found perhaps the greatest green product known to man…mops on slippers called Slipper Genies, I bought ours at Sur La Table. The mop bottoms come off so you can wash them.
One big item on my greening my home project is a good-looking, versatile, shoe rack. I haven’t been able to find one, I may just have to design one myself. In the meantime, we’ll have to endure the mess at the front door.