Doors and entry ways take a massive beating all winter long.  Now is a great time to clean up those thresholds while the kids are still in school and you have enough time to clean, prime & paint or stain your thresholds.  It's basic threshold clean up - lightly sand them, then you can use a deck stain or paint such as Wolman's DuraStain - which is available in solid and semi-transparent - which is also water repellent.  For a quick clean up solution, Wolman's Deck & Fence Brightener or DeckBrite works well and will clean the dirt and brighten your wood which prepares it for painting or staining.  If you use an exterior grade of stain or paint it will protect the wood a bit better and withstand months of in & out in the rain, scuffing and you will be ready for the winter boot-stomping months as well. After your great threshold clean up you may want to invest a few more bucks and replace the weather stripping on the bottom on the door which will give you added insulation while running your air conditioner.    DuraStain is available in over 10 different colors - all the way from Chestnut Brown to Colonial Blue.