I just don't bother trying to save the rental on a drywall lift anymore, I'll just get it. More than half a sheet overhead, drywall lift. I don't need the hassle.
Working alone, definitely clamps. I have the Bessey squeezy ones, great for holding one end of a board. The quickclamps are good I've heard, same thing cheaper. Pony or other brand spring clamps.
A good hand truck. Two wheeler, longshoreman dolly. I've got a fiberglass one, doesn't rust, lighter.
A lumber yard that delivers.
ratchet straps
radio w/ipod
a wheel for the MFT (thanks qwas?)
roller boy dollys
ikea bags (pass the long handle through the short handle on the opposite side, then tie the two long handles in an overhand knot. Great handle, you can carry heaps)
44 Gal rubbermaid can on wheel dolly. I took a whole bathroom through the front door of the house with this.