What do you have in your bugout bag?

A bunch of great ideas.
Me, I use a 3 tier system. On me or around me I have a personal "get home kit" which is a small 24 hour kit with a 45acp, first aid kit, fire kit, compass, a knife or two, mylar blanket, whistle, mirror, and energy food and individual water containers.
Step two (in auto or office depending where I'll be) is a back pack, one per person with 72 hours supplies of food meds and larger water containers, water filters and purifiers, flares, 5.56mm ammo, bigger first aid kit, hygiene kit, mess kits, woobies, chem lights, entrenching tool, battery lights, personal chargers, back up lap top, rope and 550 cord, deck of cards, tomahawk, change of clothes.
Third tier is a portable SIP kit, 28 days supplies and fuel. I figure if I need more than 28 days then fit has really hit the shan and I need to start working on major resources management.
But I'm fairly rural, 20 min drive to the nearest store, so around here this stuff is pretty common.
I'm curious what urban folks carry?

"you can never have too much red wine, too much ammunition, or too many books"
Kipling

While I was assigned to 10th Mountain Div, a subordinate unit of XVIIIth ABC. Our Bug out bags were an inspectable item for all three bags. They were seasonal and were inspected a minimum of once every 30 days to ensure all items were packed according to list. The one bag we had leeway on was our aircraft carry on bag. In that I always had a good book, poncho liner, wet wipes, mini shaving /1st aid kit, mini pillow, mini flashlight, alarm clock, change of underwire and 3 pair of socks, a note book and a few extra pens.

3 days worth of water in hermetically sealed pouches, 3 days emergency rations, lifeboat matches, 550 cord, First Aid Kit (with individual 1 use packets of pain reliever, antibiotic, sting/rash relief, etc.), knife, sweetened drink mix packs, emergency mylar shelter (tube tent), emergency mylar sleeping bag, filter mask, ammo, 1 oz silver bullion bars, baby wipes, and more that I am forgetting, but you get the idea.

Every thing except the kitchen sink.. PO2 Jack Mitchell

500 rounds of 5.56, a camelback full of Jameson, a poncho liner and a package of bacon jerky.

Mine ends up being a foot locker. For the medical portion, I'd recommend Adventure Medical Kits or something similar. Their Professional Mountain Medic is my favorite. Not cheap, but much more than a first aid kit. http://www.adventuremedicalkits.com/medical-kits/professional-mountain-medic.html

I am focused on a travel kit with an ax, fire extinguisher, crow bar, and chains.

All the things I need to survive for 48 hours, clothes, food, ammo, water, shelter, extra blades, fire starter, bug dope, sun screen, hat, first aid kit.

Ohh, i can't share that. but it would make you drool!