1. Spread the flat sheet out on the mattress that already has the fitted sheet on the bottom and center it. Place the top end of the sheet about 1 inch from the edge of the mattress at the head of the bed.
2. Lift the mattress and pull the top sheet snugly under the mattress.
Do this at both sides of the bed so that the top sheet is firmly tucked under the mattress at the foot of the bed.
3. "Eyeball" a line from the corner of the mattress to the side edge of the sheet that is hanging down.
This imaginary line should be at about a 45 degree angle.
4. Using this imaginary line pick up the edge of the sheet at the "sweet spot".
This will be the only spot where you pick up the sheet from now on.
5. Fold the sheet back over the mattress. It helps if you put your free hand on the edge of the mattress and fold the sheet over it
6. Tuck in the sheet on the side of the bed that is hanging below the mattress. It should look like a little triangle and that is what gets tucked under the
mattress.
7. Pick up the edge of the sheet again, right on the "sweet spot". Put your free hand on the side of the mattress this time. Bring the sheet down over your hand.