I second the motion for wt/dry paper. I use 1/2 sheet 220, 600, and 800. I would get a few sheets at your local NAPA or other auto parts that sells auto paint and supplies. I order from Lee Valley and other woodworking supplies quite a bit, and if all you get is the sandpaper, you'll pay more in shipping than you need to.

That selection of grits I mentioned isn;t what you'd use at home, of course, just for use in the field if you had to dress up your edge. I've also recently began to carry a diamond rod sharpener that retracts into a pen-like tube and is no bigger than a writing pen...just in case I had to take some or all of a ding or two out. I think I picked it up at Lowes for about $9