Store sensitive personal info on encrypted drives only.
If you aren't willing to use strong encryption, keep this stuff in paper form only.
Check out Wikipedia.org/wiki/TrueCrypt.
Prepare for corruption. Keep copies of the encrypted drive in several locations.

-Bills
Internet
Electricity
Water
Cable
Phone

-Car
Title
Purchase docs
Registration
Tires
Battery
Oil
Receipts
Insurance

-Credit Card Statements

-Household Goods
Electronics
Furniture
Tools
Insurance Photos

-House
Repairs
Appliances
Outside

-Insurance
Home
Life
Health

-Investments
Bank statements
Stock 
CDs
Currency
Collectibles

-Med/Dental Records

-Personal
Address Book
Awards
Birth Certificates
Driver License
Education Transcripts
Family Tree
House Deed/Mortgage/Drawings
Letters
Maps
Marriage Certificate
Military DD-214, Orders, Awards, Efficiency Reports, Contacts
Newspaper articles
Notes
Passwords/PINs/How to verify ID/Keys/Activation Codes/Support Numbers
Plans
Professional Certifications
Memberships/Sams/Costco 
SSN/Social Security statements
VoterID
Will/Trust/Medical Directive
Similar Docs from others

-Receipts

-Taxes
Property
Income


-EBooks
Entertainment
NonFiction/How-To
User Manuals

-Music

-Photo Albums

-Videos