I'd like a full view storm door in front of my front door. The left side of the opening is 80" and the right seems to be about 79 7/8". The frame is some kind of wood. I'm a complete novice, so I'm not sure if sanding it makes a lick of sense, or if it's better to find someone that makes a slightly smaller storm door (and if so, where to look).
You can spend an hour or two with a sharp utility knife, a saw, some sandpaper and a can of paint, or you can triple (or more) the cost of your storm door by getting a custom built one that's 1/8" smaller than standard.
To be honest, though, an 80x32" storm door is the nominal listing size - the actual door will probably be 79-3x4" x 31-3/4" and will fit quite nicely. Stop by your local storm door retailer with a tape measure in hand and measure the physical size. Or, ask the sales guy for the actual dimensions. Odds are good an off-the-shelf door will fit without any tailoring at all.