Where I grew up in Missouri, we always had great summers for a garden, though I never much participated except to challenge my sister to see who could eat more hot peppers. Mostly my parents grew tomatoes, cucumbers, peppers. We never canned or preserved, though. Sometimes my mom would put the peppers in the windows to dry, but that was it.
I always lived close enough to woods to hunt, but I never did. I'm a decent shot, and could do it if necessary, but it wasn't something that our family really was into. I did (and still do) love fishing. If I had to start from scratch to provide food, that's where I would start.
As for electricity, the biggest use would be heat, and keeping clean. If we're considering the type of occurrence that would cause this type of societal regression, then the majority of your electrical needs would disappear overnight. Consider TV, Internet, and cable/satellite would be useless.
Where I'm at now, in Okinawa, the weather seems to be warm enough to grow all year. (I haven't had a plant through the winter yet, because I've just recently started gardening) Of course, being a small tropical island, fish is in abundance as well. And again, fishing would be the first place I would start if I needed to provide my own source of sustenance. Gardening would be my number 2 because I'm so limited on space.
Slightly off topic is the sustainability of the different cultures. In Japan for example, they are almost ultra conservative when it comes do daily life. Everyone recycles. They have booths set up at festivals with people staffing them to help everyone separate their trash into the right bins! Most people even turn off the shower water when they are lathering, as to not waste it. When me and my wife moved in together, her electric bill more than doubled. She had a computer she hadn't used in at least two years, and she had just cancelled her internet a few months before I met her. She only had a small tv and her cell phone. At that apartment, we had a dryer, but I only saw her use it during a typhoon that lasted more than 2 days. Otherwise we dried clothes outside.
I guess the point I'm making is a lot of people don't realize how much stuff they have is actually unnecessary. I think in a self-sufficiency test, most people would surprise themselves with the things they can go without. Humans are adaptable creatures, which is why we're still here.
These are standard fare where I'm at. And I have a love hate relationship with them. Electricity is expensive here, so most use natural gas to heat. My biggest problem is I have to run the bathroom sink on hot or the trip switch will cut off while I'm still in the shower. So while I'm enjoying my nice warm shower, it'll suddenly get bone cold. After a few seconds the heater turns back on when it detects the temperature drop, but I can't imagine most people understand how infuriating that could be. It's not nearly as bad during the summer, and the ground and building actually get warm enough I don't even use hot water for my showers during the hottest months of the year.One of our next foot print reducing steps will be a tankless on-demand water heater