You could always use the trick I used to learn the LT screws:
Print out a pic of the bike and tape it to a piece of cardboard (a soda or beer case bottom works well).
When you remove a screw, punch it through the pic (and the cardboard) in the location that it came out of.
When reassembling, just grab the screws stuck in the picture of the part you're putting back on.
That helped a bunch.
Now I do it by length and location. Short screws if there's one panel to go through, medium screws if there are two panels, and longer screws if there's a rubber well nut to go into. Simple.
Ken IBA# 366
'13 K16GTL & '09 K13GT-LD
Some people see the gas tank as half empty. Some see it as half full.
All I care is that I know where the next tankful is coming from...