Fast Tire Changes With an Electric Impact Wrench
In less time than it takes your air compressor to pump up to full pressure, you could remove the lug nuts from two wheels using an electric impact wrench. Sure, the electric models don't pack the same torque as an air-powered wrench, but you don't need that much torque just to remove lug nuts. If all you're doing is tire rotation and an occasional heavy-duty repair, an electric impact wrench is just the ticket (one choice is the DEWALT DW292 1/2-Inch 345-ft.-lb. Impact Wrench, available at home centers or amazon.com). Just make sure you use a hand-held torque wrench to tighten the lug nuts.
Save Your Back and Knees With a Rolling Seat
Find creeper seats at any auto parts store, home center or online tool site. The model shown here is the Sunex 8507 Creeper Seat. A unit with a pneumatic lift and a contoured seat (for you Ferrari owners) could set you back a little more.
Diagnose With a Stethoscope
Got a knocking, ticking or humming sound and don't know where it's coming from? Pinpoint the problem with an automotive stethoscope (one example is the Lisle 52500 Mechanic's Stethoscope). Just touch the probe to the most likely suspects and the culprit will stand out like a sore thumb. Pick up a stethoscope at any auto parts store.