You may already have many, if not all, of your products added to your store at this point. However, before you launch, it's good practice to go through the product-related features of your store so that you leverage the full marketing power of Magento.
For more details on product management features, refer to Chapter 5, Products.
If you already have products added, your categories will most likely be already configured as well. However, you should now take the time to add category descriptions and images that can help communication with your customers and search engines. Experiment with the configurations to give your categories the most beneficial layout features.