Drilling
One method that doesn't generally require complex machinery is drilling or punching. Here, the drilling device makes holes in hard drives and storage media, destroying magnetic platters and internal circuitry to the point where the device becomes unusable. This small hard drive shredder (HDD shredder) uses a hand drill, a hammer, or a nail gun to repeatedly drive nails through storage media housing.
Though suitable for Do-It-Yourself operations, the difficulty lies in reducing the hardware to a sufficiently damaged state to ensure that no data on it remains recoverable. The danger of flying shards and the release of toxins also introduce a considerable element of personal risk.
As you will have noticed from the preceding descriptions of destruction techniques, a recurring theme is "Don't try this yourself -- leave it to a professional." In the realm of storage media disposal, the professional in question would be a hard drive destruction service or hard drive shredding service.