Mosaic Stitches are great stitches for any square area on your canvas that is two canvas threads by two canvas threads. 

The stitch is made up of two Tent Stitches and one Diagonal Stitch over two canvas intersections. These stitches all span towards the upper right hand corner of the canvas. 

Mosaic Stitches can be lined up in neat rows, or placed anywhere in the canvas that there is a 2x2 square. 

This stitch can also be reversed. That diagram can be found here.