8 Time-Saving Approaches to Everyday Tasks
"The fastest way is to do it badly, in a big lump, which is what many of us do. But the fastest way to do it right is to match the corners, nesting the elasticated parts together, top with top and bottom with bottom. Lay it on a flat surface, and then fold again, creating a rectangle with all four corners together. The stretchy curved bits are flat now, allowing you to fold the sheet easily."
—Jill Cooper, co-creator of the blog Living on a Dime