Using the corners.....
When I band-saw a round from a square bowl blank before turning, I can never simply discard the "corners", especially when I have paid a premium price for an exotic hardwood. This is the 'frugal' [read: cheapness] gene being expressed, or over-expressed if the wood was really expensive!
If the corners are large enough, I will use the band saw to make 'micro-blanks' for use in turning earrings, small knobs, finials, or other small scale items.
If the corners aren't too big, or when the color or figure is particularly nice, I use a plug cutter to cut as many plugs (3/8", 1/2", and 5/8") as I can, using Vertias [Lee Valley] plug cutters on the drill press. I have an inventory of plugs over 20 species of different colored woods that I can go to if I need to accent a turned piece, or repair a defect. Contrasting plugs can also be used for flat work for those of us that still do that kind of thing once in a while (Can I say that here?). Forstner bits can work well on turned items to cut a clean hole, and the plugs can be an interesting addition (or even a focus) on "round pieces" too.
I try to follow the concept taught to me by my dad and other Scout leaders - "nothing goes to waste"..... I suppose we were 'being green' 35+ years ago, but we didn't know it!
Rob Wallace