For a survival kit to be of help, you need to have it with you, so it should be small and light to be comfortable to carry. And a business card case takes very little space and is light. I had read a few instructables on survival kits when i found a few items in the shape of credit cards. I found an old case for business cards and thought this would make a nice survival kit.
Please note that this is a very basic list oft items that could come handy. It will not save you in a real emergency but it can be of help. So the author is not liable. Always prepare according to the situation you might face.
Please vote for this instructable in the Apocalypse Preparedness Contest if you like it.
Thanks to jmwells and sixsmith for their comments!
Step 1: Contain / Signal
The case. would be ideal if its made of polished or chromed metal so it could double as a signalling mirror for emergency situations.
Step 2: Cut
This covers basic cutting tasks.
Step 3: Screw / Saw / Open
There is a number of credit card sized tools available on the web.
Step 4: Heal
plasters for small injuries.
Step 5: Pay
Money comes in handy in any situation, so fold a few bills into the case.
Step 6: Ignite
Get a few outdoor matches that can be lit on any rough surface. You never know when you need to ... come on baby light my fire.
Step 7: Sew
A big sewing needle might be handy if you need to repair clothes or sew a wound.
Step 8: Hold Together
A few safety Pins can hold things together when everything is coming apart.
Step 9: Disinfect
Alcoholic swipes are useful if you want to sanitize either your hands or maybe a toilet seat.