Getting Ready to Pack

I've got a big pile of things that I'm packing up for Ecuador on top of my dresser right now.  I have the same feelings that I get when I pack for a camp out:
On one hand I feel like I'm over packing, but the Boy Scout side of me is always saying "Be Prepared."
On the other hand I feel like I'm forgetting a whole bunch of really important somethings, I guess I'll figure out what they are when I get there...