We've cut down on everything. We have just the basic cable, lowest speed internet and phone service, cancelled newspaper subscription, no cell phone at all, no fancy electronic gadgets that I wouldn't know how to operate anyway, keep the thermostat low in winter and high in summer, and don't let the water run down the drain in the shower when we're waiting for it to get hot; we collect in a bucket to use for plants.
We also eat a lot of meals made with hamburger and chicken, buying only when it's on sale.