Learned how to cook easy dishes for my family. My wife and I for years went all out on cooking stovetop dishes that take an hour or more of chopping and other kitchen labor before the meal and another 30-45 minutes of cleanup afterwards.
Exposure to Spanish dining habits on a vacation, use of time-saving tools such as an electronic pressure cooker and rice cooker, and learning how to use an oven for simple dishes really changed things for us.