I'm Cheap and Proud of It

The economic crisis is causing a lot of people to want to be better prepared. I'd like to be one of those people. Utah probably isn't the only place in the U.S. making a huge point to stock up on emergency supplies and beef up their food storage supplies.  For the last several months (before losing my jobs), one of my priorities was to shop more at Costco, buying larger essential items, and stock up slowly on different necessities when I saw them on sale at the stores. As a result, when I lost my jobs and money, I was in a good place with food and several toiletry items. I really haven't had to spend much money at all on buying groceries over the last few months. But now it has been about two months, and... yeah. I'm down to the stuff I really don't want to eat or just wasn't very useful to start with. For instance, cans of mushrooms. What the heck did I buy 10 cans of sliced mushrooms for? If I remember correctly it was because I like to add them to spaghetti sauce, and I got them for $0.20 a piece. It seemed like a good idea at the time.
So now here we are entering a potential economic crisis, I have little in the way of funds, and I just depleted my emergency supplies! Uh oh. But on the bright side, I did have the supplies!
Today I returned to my old ways of coupon cutting. But I took it one step further than usual! I even pulled out the weekly ads for the two local grocery stores and compared who had better prices and where my coupons will be doubled. I've made my menu for the next few weeks around the coupons and options. If my math is right, I'm going to save over 40% on groceries this week. I'm actually kind of excited to go shopping, just to see how much I can save!
I'd love to get more pointers on ways to save money on essentials. I cut coupons, comparison shop, and frequent the double coupon days. I find buying bulk for just one person usually means a lot of my food goes bad before I can get to it. So what do you do? Got any suggestions?