One of the best reuses of a tool I have is a thin bladed paring knife. When I have to rip a lot of long straight seams, I insert the pointy tip into the seam and just slide it along. It cuts those stitches so fast as it flies along the seams, and the thin blade stays right in the folded hem.
This works best on deconstructing linens, etc. but is good on almost any straight seam.
I am also a dedicated user of the clear plastic produce containers.