If you constantly find yourself needing to dig through your big tool chest for a simple job, this Hammer/Screwdriver combination tool is the perfect space-saving tool to keep in your desk for those small jobs.
The tool is a small hammer that opens up to reveal four screwdrivers of varying sizes inside — almost like a Russian Nesting Doll, but for tools. It probably won't get you through a home remodeling project, but it's perfect for tons of little jobs that don't warrant a trip to the workshop. I actually had one of these in the house for most of my life, and it was incredibly useful — and at only $US20, there's no reason not to have one in your desk (or in the kitchen, or anywhere else you might need a tool like this). Hit the link to check it out.