I loved this post on LDS Home Storage Centers by Self-Reliant Sisters this past week. They've included photos of the labels that are included with the products available at these Home Storage Centers. This is a great resource for both planning and inventory. You can see product weights and estimated storage lives in a glance. These labels also include preparation information for many of the products - which is great if you happen to lose a label.
Another fantastic information resource for inventory or planning is the Home Storage Center Order Form. These forms included updated prices, weights and estimated storage lives. They also have a form in Spanish.