> Preheat watery vegetables in the microwave

There's actually a lot of stuff you can halfway-heat in the microwave.

Air frying frozen <anything>? Nuke it for 2 min and air-fry for 3 min, instead of air-frying for 12 min.

Ice cream rock solid? Nuke a pint for 15 seconds. It won't melt, just soften.

Cold ketchup in a dipping bowl? Nuke for 5 seconds to bring it to room temperature, so you're not putting cold ketchup on warm food.

But the best? You know how tomatoes get a mealy texture when kept in the fridge, which is why everybody says not to keep in them in the fridge, even though they last so much longer that way? That's only as long as they're chilled. Nuke for 10 seconds to bring back to room temperature. The texture returns 100% to normal.