I've just started my EDC adventure! I'm tight on space for carrying things on my person (in my pockets), but have my backpack and car too. I'll focus on that next, but I have a feeling some ideas you give me here will end up in one of those two places. At the moment I need compact suggestions for water purification (I keep a water bottle in my pack), fire, and first aid. Preferably that can fit in a small non-folding wallet, or behind the otter box of a phone. At the moment I keep this on my person (in my pockets): Phone (including contacts of friends living on/near campus) Small non-folding Wallet (Money (100 minimum, several 5 bills for vending machines if I need water/food), cards, ID, a few matches, fisher space pen refill) Keys (Lanyard, photon light, acme tornado whistle, leatherman micra) Customized Zebra F-701 I have 1 tool for starting fire (need another), a tool for bandaging (micra to cut clothes, need another), 2 lights (phone and photon), 2 tools for writing, and 3 tools for signaling. The micra should be able to work as a seat belt cutter and the zebra seems more than sturdy enough to break glass. If it were up to me I would be carrying a spyderco cricket, but with the no weapon policy that is asking for trouble. With my major I can easily explain the micra, which seems more than able enough to handle most cutting jobs. The pen easily flies below radar, as should the rest of my gear. I'll soon add a cardboard card wrapped in floss to the wallet soon for some "string". I might also keep a pocket monkey in my phone's otterbox for a backup multi-tool. I will have all the gear on me through out the year as well, with the exclusion of my car keys when I'm riding with family/friends. I'll probably purchase the cricket for this. My phone would turn into my sole light/signaling device. But with family/friends around I should be okay without the whistle and photon.