To give a sisal or sea-grass area rug some traction, flip it over, and apply lines of acrylic-latex caulk every 6 inches or so. Once dry, you can safely put down your rug; the rubbery strips will hold it in place.
DIY: Amazingly Awesome Painted & Stenciled Subfloor Tutorial - this before & after project is truly amazing! It's an inexpensive sub-floor! If you need new flooring, forget the hardwood! Do this & save a lot of $!