The first way is to "edit" or leave off parts of a design. For this Little House Needleworks design, I wanted the focal point to be the tomb, and I wanted a more stark look. I didn't stitch the angels or the star above the tomb, and I replaced the bright pink flowers with the purples used in the angels.
The other easy way to change the focal point of a design is to "zoom in" on a small section. This is Snowy Foxes by Country Cottage Needleworks...
...and this is my "cropped" version of the design, focusing on the foxes. It almost looks like a completely different design, but nope! It's just zoomed in!
If you start looking at your stash with these ideas in mind, you might see a few designs that you could stitch up more quickly than you thought, simply by editing or cropping your favorite parts.