you could also use shelves across the back to raise up items so that you can see them better

I have a giant cabinet in my house for kitchen stuff too, and I was able to put a bunch of wide elfa drawer units in it from the Container Store and they are awesome. I like it much better than trying to have stuff in front of other stuff. If I do that method, I will never (ever!!) see the stuff in the back of the cabinet until I move! :)

The drawers come in a variety of sizes -- that's just one example. The biggest footprint is 21"x21" (and you can get various heights). Your shelves may not accommodate the full drawer unit height-wise, but you can get these things called easy gliders that I put in some of my cabinets. They use the same drawers as the other cabinets.

The drawers come in 21 or 17 inch depths.

I *totally* recommend a trip or phone call to the Container Store to get advice on what will work in your cabinet. The whole elfa system is pretty awesomely flexible, but sometimes it can be a little confusing to figure out what you need, and they have people to help you!

I'm actually using banana boxes to organize the lower cabinets in my kitchen. It's a little makeshift, but the price can't be beat. Nobody sees them as they're behind doors.

You could have pantry pull out bins to the extent they take up space on the shelves... In addition to these you could add cabinet organisers along the doors of the the pantry which will fill up to the extent of the balance space... i have attached a image that shows what it could finally look like... you could look for deeper shelves on the door than whats in the picture

http://www.google.co.in/imgres?imgurl=http://img.alibaba.com/photo/50637279/Kitchen_cabinet_organizer.jpg&imgrefurl=http://zsxintian.en.alibaba.com/product/50637279-50138620/Kitchen_cabinet_organizer.html&usg=__65qMtbW6Q9Yp4x0GJMhxervKwA4=&h=360&w=360&sz=38&hl=en&start=17&um=1&itbs=1&tbnid=E_dRU_rILxaWeM:&tbnh=121&tbnw=121&prev=/images%3Fq%3Dcabinet%2Borganizers%26um%3D1%26hl%3Den%26sa%3DN%26tbs%3Disch:1

Pull-out shelves come in a myriad of stock sizes, and can be customized. Check out www.shelvesthatslide.com

If possible, get a light installed so you can SEE all the way to the back. I have a small walk-in pantry, and a light makes a HUGE difference!

I don't know if your pantry is already organized this way, but it makes sense to have themed items on different shelves. For instance, I have a baking shelf and an Italian shelf in my pantry.

I organized a shelf at work with themed shelves then placed signs inside the door listing the items on that shelf. This way you know exactly what is on the shelf and can replace things as necessary.

I don't think you necessarily need boxes that are exactly the depth of your pantry. Boxes that are smaller allow for bulky items to rest outside the box and allows you to place similarly themed items together. That's my take on it, anyway.

Raising shelves is a good idea.

This doesn't sound very classy (and it isn't, but hey, this is a rental) but we have to ceiling closet in our kitchen that is very narrow. I use labeled milk crates to store most of the food/kitchen supplies that live there. I'm pretty short and pull out shelves wouldn't work very well for the upper shelves because I would have a hard time looking for the items kept there. I have to be able to take things off the upper shelves and out of the closet in order to access the stuff toward the top, anyway. The milk crates make it easy. They're labeled, too (booze, liquids, immersion blender) so that we can all find what we're looking for. But I think that banana boxes would work well, too.

Plastic bins, boxes, or milk crates may work for some people (these are behind closed doors anyways), but you can find some great looking storage bins at some of the big-box stores (Target, Ikea, etc.).