Pack it up Pack it in, Let me begin!

Holy smokes! How does one decide what necessities are required for three and half weeks abroad? Sure the essentials, are well, essential but it seems about every ten minutes or so I think of yet another thing that I still need to pack.  I have began to question if things like tweezers and q-tips are needworthy enough to take along. And yeah, I'm sure I will survive without my tweezers, but what if I'm traveling through the Mekong, and get a splinter? I'll totally need them! So it's all of these "what ifs" that is making my backpack go from empty to full lickity split! Note to self: don't forget my glasses!