Non-skid Paint

A more durable and less-noticeable option is to use the kind of non-skid paint our House Detective mentioned. You can either buy it pre-mixed, or mix your own in any color using construction sand or a texturizing product. Or if you want an easy solution that doesn't change the look of your steps, there's clear, non-skid spray. Here's how it's applied:

• Sweep the surface, then wash it down with water and let it dry.
  
• Fill any cracks or holes with an appropriate filler for the surface.
  
• Finally, just spray on the non-skid texture from about a foot away, moving evenly back and forth.

If you use the non-skid spray, you'll need to reapply it once every six months or so for best results.