Rarely-changing

• A laminated credit-card-shaped paper with all of the barcodes I might ever need to scan (in particular, the Jewel/Dominick's stupid card thingies)
• General references:
  • conversions
  • formulas (Ohm's law,
• Personal references:
  • other people: important phone numbers, birthdays, ...
  • me: driver's license #, SSN, etc