(1) Recently I wanted a bag of sugar. At my closest grocery store, the bag was 4 pounds instead of 5. No problem: At my next stop at Sam's Club, I got two bags, 15 pounds each.
(2) Sometimes dish soap comes in small bottles. Okay, at Sam's get a gallon jug of their generic dish soap and with a funnel refill the small bottles. Same for glass cleaner, etc.
(3) Pizza can be $7 to $20. Okay. (i) In a 5 quart bowl, add 750 ml water and 1 T dry yeast. Let the yeast soften. Measure 1 kg of flour. Add 1 T salt to the water, stir, add 2/3rds of the flour, stir, add the rest of the flour, mix some, and dump on a floured board. By hand mix and knead for 8 minutes. Return to the bowl, cover, and let rise to fill the bowl. Dump on the board, form in a long loaf, cut into 8 equal pieces, place each each in a covered plastic bowl, refrigerate. Starting the next day for two weeks or so, for a pizza, take one of the dough pieces, in a microwave proof plate form in a circle 7-9" in diameter, and warm in microwave for 3 minutes. Add 3 T sauce, 1/4 C shredded Mozzarella, and maybe some pepperoni, sausage, etc., place in a clean steel pan, over medium heat, covered, for 13 minutes, move to a cutting board, slice, slide to a dinner plate, add 1 T of grated hard cheese, and eat. Get the flour, 25 pounds, at Sam's, and then the flour for one pizza is about 9 cents. With good toppings, the total cost is still about $1. So, anytime, in 20 minutes, 7 of effort and 13 waiting, get a pizza faster, better, and cheaper than frozen, carryout, or delivery.