I'm with bushboy on the Shinto rasp. I'd be lost without mine. The fine and coarse sides on the Shinto rasp really make it two tools in one.
A good drawknife is pretty useful for staves, as is a good sharp hatchet to get the bulk of un-needed wood off.
One of those 4-in-1 rasps is handy.
A scraper is pretty essential and a chainsaw sharpening file will let you make nock grooves.
Add a few grades of sandpaper and you're fairly well set.
Guy