We have a 2014 Winnebago forza 38r with the same problem. Cabinets are deep about 30 inches and only about 7 inches wide. I ended up storing things in the top upper cabinet that I did not use daily like extra paper towels, etc. The lower bottom cabinet some small appliances. For the other shelves, I went to Bed , bath & beyond and bought two bamboo trays, one 12 inches long and the other 15 inches long for each of the other shelves. Both about 6 inches wide. I put the longest one in the back of the cabinet and the shorter one in the front. A simple, easy, quick fix that was not too expensive. I can simply pull the trays out and see what I have stored in them. They seem to slide in and out pretty well on the lining in the cabinet. Still some wasted space but not as much as before. Lighting is bad in the back of the cabinet too. I just keep a light in the cabinet that you can turn on/off when needed....you could use a small flashlight. I like the bamboo tray as opposed to one of the clear plastic bins because the insides were more squared off instead of rounded and seemed to store things better. I keep mainly my canned goods in these trays..