Mosaic Stitch
Mosaic Stitch is the smallest form of Box Stitch, made up of just three stitches. It and the diagonal version of it are some of the most popular stitches in needlepoint.
Because it is small, it can be used in many areas in needlepoint projects. Because it is square, it’s easy to vary it by changing stitch direction, thread, or color. I find this to be a stitch I go to time and time again.
Mosaic Stitch looks like this:

Mosaic Stitch, copyright Napa Needlepoint
Share the smallest stitches between two units, and you get Diagonal Mosaic:

Diagonal Mosaic, copyright Napa Needlepoint
Stitch only the longest and one of the short stitches and you get Half Mosaic, a useful little triangle.

Half Mosaic, copyright Napa Needlepoint

Alternating Mosaic, copyright Napa Needlepoint
You can stitch it in three colors, making a needlepoint version of a gingham fabric, Gingham Mosaic.

Gingham Mosaic, copyright Napa Needlepoint
You can alternate Mosaic with another stitch that’s the same size, such as Smyrna Cross, Mosaic-Smyrna Check.

Mosaic-Smyrna Check, copyright Napa Needlepoint
There are so many variations of this stitch. Try making some of your own.