Michele,

In general, while we are not counting carbs or fat, you want to avoid things that have sugar, saturated fats, or trans fats. It's usually best to shop from the outer rim of the grocery store as that is where the fresh foods usually are. The key is to try and avoid processed foods as much as possible and get fresh unprocessed alternatives.

Edit: Also when looking at thinks like dairy, remember to get low fat or fat-free.

Edited to correctly state SBD rules.