Here you go, from personal experience:
1 - PICTURES PICTURES PICTURES PICTURES of EVERYTHING
from all angles before you take it apart.
2 - HUNDREDS of small plastic Ziploc bags to put parts in along with a piece of paper telling you where it went and what direction was 'front' or 'up'.
3 - Original parts manuals showing blowups of everything on the sled. Pay whatever you have to to get your hands on these.
4 - Start with the sled UPSIDE DOWN on a pair of sawhorses - this makes getting the undercarriage and track installed a breeze.
5 - After the track & suspension are in, set the sled upright on a couple of horses with a 4x8 sheet of 3/4" plywood screwed to the horses - this is the level you want to work on it.
6 - TAKE YOUR TIME BEFORE YOU PUT ON ANY PART, MAKE SURE ANOTHER PART DOESN'T NEED TO GO ON FIRST!!!
7 - Did I mention PICTURES PICTURES PICTURES PICTURES!!!!
Hope this helps!!!! Good Luck!