I use squares this size to "snowball" the corners of other peices or blocks, as in the quilt below. The reds and greens were all little squares placed over the corners of the base block, sewn across the diagonal, flipped back and pressed, the middle layer trimmed out.
Jan in VA
Floral Garden quilt
[ATTACH=CONFIG]152631[/ATTACH]
Both of these use the square on a corner technique.
[ATTACH=CONFIG]152639[/ATTACH]