Let's start with the basics: you're going to need some pasta sheets, a few cups of meat sauce, and a blend of cheeses that will make your taste buds do the happy dance. Now, imagine you're building a tower of power, with each layer supporting the next - that's basically what you're doing with a lasagna. But, instead of blocks, you're using delicious food, and that's what makes it so cool!
So, you've got your ingredients, and now it's time to start stacking. Do you start with the pasta, or do you begin with a layer of sauce? The answer is, it doesn't really matter, as long as you follow your heart (and your stomach). But, if you want a pro tip, start with a thin layer of sauce to prevent the pasta from getting dry and crunchy.