I never got the "bread and milk" thing - milk if you have little kids who don't eat much in the way of food, I guess. You want non-perishables, and you don't want to be in and out of the fridge if you lose power. So bread, yes, for peanut butter sandwiches (jelly won't spoil if there's no power). Hard boiled eggs for protein, tuna, even cheese will keep decently. Fruit and raw veggies, yup. Water water water - we fill about 5-6 pitchers for drinking and making our healthy shakes, plus half a tub for flushing toilets with a bucket if pumps fail.
Wine and chocolate, cheese and crackers, are essential staples of course!
We have headlamps - like what runners use, with the elastic strap that goes around your head. Sounds (and looks) dumb but they are great for reading and for walking around the dark house without carrying candles. We have candles and lanterns for stationary positions vs. carrying around. Firewood, kindling, matches, Scrabble game (manageable in low light), jigsaw puzzles for good light - all those things that take a long time are great when all you have is time!
We have extra batteries charged up, fill the gas tank to prevent gas line freezing, shovels to keep the vents outside free of snow build-up, and to clear a short path to take the dog outside. And we get a shower early on - if we lose hot water (as we did when we lost power for 5 days a few years back), it gets a little ripe in here!
The rest of the entertainment is keeping score on how many times each of us automatically does something requiring power even though we know it's out: grabbing the TV remote, flipping the light switch, turning on the ceiling fan to keep the heat from rising up, etc. It's amazing how often we do stuff out of habit! We also try to stay ahead of the plows to keep the hydrants freed up and to clear the mess in front of the mailbox and the driveway from the plows going by. Trying to get through it after 2 feet of snow and 24 hours is impossible. Then we guess which neighbor will be the most impatient, go out in the car before it's safe, and get stuck. Obviously we are very easy to entertain!!
It's also so much fun to see kids, especially older kids (like high school) get out their sleds and make snowmen and figure out that they can go things without electricity and electronic devices/computers! They really have such a great time!