The first thing you need to look for is the USDA organic seal, because this ensures that the product is at least 95% organic. You can find this on single-ingredient foods like produce.
This video explains more "organic" labels and what they mean exactly:
Unfortunately, some food labels are much more misleading, specifically "natural" and "all natural." The USDA's rules on these sort of labels are very vague, which means that companies can use these terms on their foods whether it's really "natural" or not. Click here to see a slideshow of specific examples of these food labels, plus other common terms that can be misleading.
Never be fooled by food companies ever again! If you want organic food, it better say "organic" on it. If you want your food to be "all natural," well, good luck with that.