Knife: I keep bringing my big Swiss Army Knife I bought when I was a kid. I've got smaller knifes and always intend to downgrade because I don't use 80% of the features... but I just keep sticking it in my pocket. It must be nostalgia. I don't recommend it for others.

Fire starter: I don't use it regularly, but when I do it is used up maps I have printed or edges of the sections I haven't got to yet. If it was an emergency and I was concerned the paper scraps didn't have enough BTUs, I would smear some lip balm on them before I used them.

Ignition source: 2 bic mini's. Cheap, reliable, and lightweight... sometimes you do get it all! If you are worried about both of them failing, bring a third.