First, a quickie. I changed all light bulbs to LED. In my kitchen alone the ceiling light used five 60 watt bulbs- 300 watts. LED bulbs with the same lumens were nine watts, or a change from 300 watts to 45 watts. Multiply that through the entire house and the savings get huge.
If you use central air, you are using double or triple the power of window AC. In my case, I have gas/hot water heat. No fans or circulators just radiators. The only power it uses is a spark for the igniter. I could run it for 2 weeks off a car battery. I have a fridge and a chest freezer. Both pull when on, but only intermittently to maintain temp. SO- look at what else you use. Electric space heaters draw 750 watts on low, 1500 on high. If you still have a tube TV ( don't laugh. I have one in my office. WAY better speakers than flats) they draw more than flats. Electric drier instead of gas? 1800 watts. Got a pool? The filter for a big pool is about a half horsepower 1200 watts. Hot tub? That heater- especially in cold weather can draw 2000 - 5000 watts. Are all your shop tools corded or cordless? Corded all draw a lot. I don't remember my average, but I am below normal
Here's a way to simplify.: During the Nor'easter of 2010- equal in damage to Sandy in my area- all I had was a Chicago Tool 1000 watt generator. I was able to run heat, fridge, chest freezer, TV (Broadcast- cable out), some lights, and a fan. I have a gas stove. It only used ONE gallon of gas every 8-9 hours. Sometimes it's about using what you NEED, not what you WANT. One guy was running an 8 KW and using almost 5 gallons of gas to my one because he WANTED central air and some other garbage during an emergency.
Note: In the interest of transparency, I am sort of a prepper lite. I happen to be an oil lamp collector, so light wasn't going to be an issue either way. I have a fireplace as well, so no one was going to freeze, and stuff like that. I just brought all of this up to show that MOST people use way more power than they need to. One can cut WAY down and never feel any difference.