Testing testing 1, 2...

Context: I am flying to Auckland tomorrow night. I'm in my room, scanning around for things that I need to pack within my modest 25kg luggage allowance. On my desk there's an empty mug of chamomile tea, a card for a dear friend that I've just written, my old film camera that's run out of battery, my bible, and a mountain of other bits. How many bits do I need to take with me?