Are you REALLY going to eat that?

Some real life shelf life for things in your cupboards:

# Beer
Unopened: 4 months.

# Brown sugar
Indefinite shelf life, stored in a moistureproof container in a cool, dry place.

# Chocolate (Hershey bar)
1 year from production date

# Coffee, canned ground
Unopened: 2 years
Opened: 1 month refrigerated

# Coffee, gourmet
Beans: 3 weeks in paper bag, longer in vacuum-seal bag (After this time, color or flavor may be affected, but product is still generally safe to consume.)
Ground: 1 week in sealed container

# Coffee, instant
Unopened: Up to 2 years
Opened: Up to 1 month

# Diet soda (and soft drinks in plastic bottles)
Unopened: 3 months from "best by" date.
Opened: Doesn't spoil, but taste is affected.

# Dried pasta
12 months

# Frozen dinners
Unopened: 12 to 18 months

# Frozen vegetables
Unopened: 18 to 24 months
Opened: 1 month

# Honey
Indefinite shelf life

# Juice, bottled (apple or cranberry)
Unopened: 8 months from production date
Opened: 7 to 10 days

# Ketchup
Unopened: 1 year (After this time, color or flavor may be affected, but product is still generally safe to consume.)
Opened or used: 4 to 6 months (After this time, color or flavor may be affected, but product is still generally safe to consume.)

# Maple syrup, real or imitation
1 year

# Maraschino cherries
Unopened: 3 to 4 years
Opened: 2 weeks at room temperature; 6 months refrigerated

And that's not all that has a shelflife:

# Miracle Gro, liquid, water-soluble
Indefinite

# Motor oil
Unopened: 2 to 5 years
Opened: 3 months

# Mr. Clean
2 years

# Paint
Unopened: Up to 10 years
Opened: 2 to 5 years

# Spray paint
2 to 3 years

# Windex
2 years

# Wood polish (Pledge)
2 years

Beauty Products
All dates are from the manufacture date, which is either displayed on the packaging or can be obtained by calling the manufacturer's customer-service number.

# Bar soap
18 months to 3 years

# Bath gel, body wash
3 years

# Bath oil
1 year

# Body bleaches and depilatories
Unopened: 2 years
Used: 6 months

# Body lotion
3 years

# Conditioner
2 to 3 years

# Deodorant
Unopened: 2 years
Used: 1 to 2 years
For antiperspirants, see expiration date

There's more here.