Accessories available can turn your plastic 5-gallon buckets into handy tool carriers. Another way to put them to use is for storing extension cords. Cut a hole near the bottom. Feed the female end just through the hole from the inside. Then coil the cord into the bucket for easy carrying. You can also put small project parts inside of recycled plastic peanut butter jars and store them in a bucket. The jars are easy to carry around, won't break, and let you easily see inside.
Using thin wood wafers called biscuits can strengthen wood joints by providing more glue bonding area. You can use a biscuit joiner (also called a plate joiner) to cut precision mating slots in boards for the biscuits, which are available in three sizes. Or, to save money you can buy a kit to convert either your router or right-angle grinder. The conversion kits will generally cost about half that of a dedicated biscuit joiner.