It doesn't matter what resources you have actually; as long as
you know what you are aiming for!
Personally, I'm aiming to get Bonus Resource FINE JEWELRY, FAST
FOOD & AFFLUENT POPULATION at this moment; since I need to
improve population & population happiness. 
Maybe later on, when my Nation is stronger, I'd go for
CONSTRUCTION, BEER & STEEL.
So my advice is, try to aim for Bonus Resources when looking out
for trade partners; to get Bonus Resources, you need to have the
pre-required basic resources.. all explained below:
[excerpt from CN FORUMS]
Affluent Population - Increases population
happiness +2. Requires Fine Jewelry, Fish, Furs, and Wine.
Asphalt - Decreases infrastructure upkeep cost
-5%. Requires Construction, Oil, and Rubber.
Automobiles - Increases population happiness +3.
Requires Asphalt and Steel.
Beer - Increases population happiness + 2.
Requires Water, Wheat, Lumber, and Aluminum.
Construction - Reduces infrastructure cost -5% and
raises the aircraft limit +10. Requires Lumber, Iron, Marble,
Aluminum, and a technology level greater than 5.
Fast Food - Increases population happiness + 2.
Requires Cattle, Sugar, Spices, and Pigs.
Fine Jewelry - Increases population happiness +
1.5. Requires Gold, Silver, Gems, and Coal.
Microchips - Reduces technology cost -8%,
increases population happiness +2. Requires Gold, Lead, Oil, and a
technology level greater than 10.
Radiation Cleanup - Removes 1 day of nuclear
anarchy. Reduces global radiation effect on an individual nation
-50% in CNT. Improves a nations environment by 10% in CN standard.
Requires Construction, Microchips, Steel, and a technology level
greater than 15.
Scholars - Increases population income +$3.00.
Requires a literacy rate greater than 90%, Lumber, and Lead.
Steel - Reduces infrastructure cost -2%. Requires
Coal and Iron.
