For each step in the disassembly process, put the different screws into different shotglasses. Don't leave the screws lying around your desk unless you are a pro.
On a piece of paper, write the step #, and place the shotglass on it. If you have cats who might knock over your shotglasses, label them (the shotglasses, not the cats) using a piece of scotch tape. Then put them where they will not get destroyed by mischievous felines like a roll of toilet paper when you forget to close the bathroom door.
Read all comments in this section; they helped me a lot. DISCLAIMER: I am an idiot, and I confused the shotglasses containing cable restraints. I then spent about an hour trying to figure out where I'd gone wrong before I realized that the restraint in the photo was not the one in my hand. No wonder my father always gives me that look of disappointment when he sees me. Good luck!