(67th) Ultimate Urban Survival Kit?

You can go to the woods and succesfully survive from an everyday life by using a knife, compass and a flintstone (and a pair of braincells, too - that is, the knowledge on how to get the tools made out of something...). And then there's this urban life , where you need a bit more: http://ericlefou.net/MES_TRUCS/MESobjets/Mon_equipement/international.htm.
Point being here is that Eric LeFou (Crazy-Eric) carries altogether 1300 different tools, gadgets and 'things' in his backpack and clothing. All my credit to Eric, I seem to be somewhat like him every now and then, nowadays less, I hope. :D.
Anyhow, makes you think how complicated this world has been made after all and what do you really need to get along the everyday life. To be honest I truly believe that less is more, in this case, too. Which reminds me to clean the trunk of our car, it's having WAY too much stuff in it :D.
Goes together with gym -training, too. Why would I need a dumbell or workbench to workout with when I got this 90 kg of meat around my (large) bones?