@Badwolf bows with a flourish.
One place I have added optional pull-ups is on the bus control lines.
Reset could just be a squiffy old cap, but I've found that benefits above about 45MHz from having some upward assistance. Some or all of BR, BG or BGK occasionally simply don't work if probed. Two of them are great big lines spanning all the various DMA bits and bobs and a little extra capacitance throws them off the deep end. I figured it would't hurt to have the option of a bit more of a pull on those.
BW