Pictures, baggies or cans for the parts and also a grease pen to mark the parts and the coinciding area it comes from. Basically do the same thing that you would do when removing and tearing down a motor or tranny. this will save you alot of time and money on tylenol. I should know as I started my tear down of the 49 with out this stuff and now I don't know where screws go or where they went when I took them off. So I will be looking at buying all new bolts nuts and screws. and some new fasteners as I snapped them taking off the chrome.
Good luck and take lots of pics to remember this joyous occasion and to help put it back together.