The lasagne sheets: to help create structure, for one of the layers, place the lasagne sheets landscape, and then the next layer place them at a portrait angle.
Baking: if you’re worried about the sauce over spilling, place a baking sheet under to catch anything that may leak.
Resting: allowing the lasagna to rest before serving is crucial! If you skip this step, yes the lasagna will taste the same, but it will also ruin the layers and be more likely to fall apart.