Here is another helpful list from the folks at Co-op America.
Look for: Low or ideally, no-VOC paint.
Look for: Paper products with a high post-consumer recycled content.
3. Light bulbs
Look for: Compact fluorescents.
Look for: Appliances with the Energy Star label.
5. Fruits and Vegetables
Look for: Organic, local, in-season produce.
Most important to buy organic to avoid pesticide residue: Apples, Bell Peppers, Celery, Cherries, Imported Grapes, Nectarines, Peaches, Pears, Potatoes, Raspberries, Spinach, and Strawberries.