Here's another tip I use: we have several cars in our family and I like to keep them all looking sharp, but waxing all of them all the time would be mean I'm always waxing something. So to keep them up without working my butt off every Sunday, I wash the entire vehicle and wax just one or two panels. Sounds goofy, but it only takes a minute after you dry it and you can (for example) do the hood, grille and bumper this week, the passengers fender and door next week and work your way around the vehicle each successive week. That way the water always beads up on the whole vehicle because it's basically getting waxed once a month and you aren't burned out from being a detail fanatic. It works for me with my truck, my '88 GT and my wife's Fusion, all of which always look great, despite the Mustang and the Fusion being dark colors.