Stop a wandering bit
Even the sharpest bit tends to skate across hard materials like tile, metal or glass, leaving loopy scratches behind. To steady a wandering bit, give it a softer place to start. Thin cardboard (the stuff cereal boxes are made from), taped firmly in place, works perfectly.
Extract a stuck plug
Struggling to pry the plug out of a hole saw might make you mutter, ‘Aw, screw it.’ And that is indeed the correct approach. Drive a long screw into the plug. When the screw hits the back of the hole saw, keep driving and the screw will magically pull out the plug. If the plug is really stubborn, you might have to add a second screw on the other side of the drill bit. Then alternate between the screws, turning one and then the other until the plug is out.
Is your level a liar?
Once upon a time, a man built a house using a lying level, so his floors were not level and his walls were not plumb. And all of the interior work, from installing cabinets to hanging doors, was a real nightmare. If you want to live happily ever after, give your level a 60-second check-up. Set it on your workbench and slip a shim under the low end until the bubble is centred. Then flip the level around, positioning the other end on exactly the same point on the shim. If the bubble isn’t centred, the level is a horizontal liar. To check vertical accuracy, follow the same steps against a wall.