If you use your imagination, you can find a lot of helpful tools in things just lying around the house.
Here are a few ideas.
You can make a drill holster (or holder) from a bleach bottle. Just turn the bottle upside down, then cut off the narrow part at the bottle’s top and remove the bottom, making a v-cut to allow for the drill’s handle. Cut slots to insert a belt or attach it to the side of your workbench.
A small piece cut from the sides of a container makes a flexible sanding “block” for intricate or curved surfaces (like trim). You can also use plastic as a paint shield, to keep paint from getting on adjacent surfaces.
Glass relish jars make great containers for screws. Drill a hole in the metal lid, and screw this to the bottom of a shelf. Then fill the jar with screws, bolts… whatever, and reattach it to its top. It won’t get knocked off a shelf, and the wide mouth makes it easy to grab a few fasteners when you need them.
Sometimes you need to drill holes to a specific depth. You can eyeball it, but it’s easy to make a mistake. Instead, wrap some masking tape around the drill bit at the depth you require, and you’ll drill to the perfect depth each time.
Drywall bead makes a great screwdriver holder. This is the metal edge you use on outside corners in drywall jobs. Place one surface against the wall so the other projects horizontally. Screw it in and drop screwdrivers into the holes that are already there. If a screwdriver’s too big to fit, it’s easy to enlarge the hole.
One more: hypodermic needles are handy for injecting glue or paint into hard-to-reach places.