Make it easy on yourself and label EVERYTHING. Put tape on all your connections and make a note on the tape what each one is (injectors, hoses, harnesses, etc). Place all nuts & bolts in baggies and label those baggies. That way you'll know where everything goes and whats SUPPOSED to be left over afterwards
You can even make a checklist of everything you disconnect as you do it, so you'll be able to back over the checklist when installing stuff.