54. A lint roller or good 'ol duct tape works well to remove pet hair from upholstery that a vacuum won't get. If you've got cloth seats on an '07-newer Silverado you'll now what we mean.
55. Microfiber towels come in several colors. Keep them separated by task to keep your paint from being contaminated by brake dust, etc.
56. Another microfiber tip: Wash separately and with only a little bit of liquid detergent. Cotton fibers and soap powder can collect in them and defeat the purpose of using a microfiber.
57. Bend a 1/8 stainless steel rod into a safety-pin shape to hold a set of combination wrenches. It will keep them in order and it's got enough spring to stay closed but still open up easily when you need to get to your tools.
58. Keep the part of the packaging for your fan belt, air filter, oil filter, etc. that has the part number and tape them under the lid of your toolbox or put them into a business card holder or binder. It will keep you from flipping through the books at the auto parts store.
59. Of course you should have a fire extinguisher in your garage that can handle all types of fire, but mounting an extra one on your welding cart will mean there's always one near where the sparks are flying.
60. JB Weld would probably work better, but if your buddy ever tears his oil pan on a curb in a Costco parking lot, bubble gum and duct tape will help you keep oil in the pan long enough to drive 8 miles. We've done it.
61. When you're working on a Super Duty or Ram with the hood up, the grille is up too, so put a heavy sheet of cardboard to cover the intercooler/condenser/radiator and keep fins from getting smashed flat when leaning over the core support.
62. To start a nut in an awkward position, drop the nut onto a screwdriver along with the necessary washers. Touch the screwdriver to the bolt and slide the washer and bolt on and get it started
63. Allen wrenches can work on Torx fasteners in a pinch, and vise versa.
64. No Dykem around when you need to mark some metal? A Sharpie or other permanent marker works well for marking metal and giving contrast to your scribe marks.
65. Toothpaste works great for getting solvent odors off your skin.
66. Have a "Plan B" for getting into your shaved truck if your battery dies. A cable running through the door into the engine compartment is an option, but only if you've got a way to unlock your hood from the outside.
67. Tailgates are easy to remove, which makes them easy to steal. A hose clamp over the open end of your tailgate's hinge will triple the time it takes to remove your tailgate. It's not much, but it can't hurt.