Let me preface this by saying I am not ready to drop $700 on an Engel refrigerator. I have a "7-day" Igloo ice chest that keeps ice frozen for about two days. I probably do everything wrong--I rarely have room for block ice, so I use two or three 7# bags of crushed ice and I open the ice chest frequently, allowing the cool air to escape. I do a good job of keeping the chest out of the sun.
So...I'm thinking I should start freezing quart-sized ice blocks. This should increase ice longevity over crushed ice and will take up less space than a 10 lb block.
Pre-freeze as many items as possible.
Possibly put beverages in a separate small ice chest to reduce opening and closing main ice chest.
What else can I do to get more than two or three days out of my ice? I would love to find a soft-sided thermal blanket to zip over my icechest to conserve cold air loss, but no one seems to make them and sewing my own isn't going to happen.
Help me stay :P