Sauté minced garlic and onion in olive oil before adding the sauce
Add a pinch of red pepper flakes
Stir in tomato paste for deeper flavor
Add butter or a splash of cream for richness
Mix in grated Parmesan or Pecorino
Add fresh basil, oregano, or parsley near the end
Simmer longer to reduce and concentrate the sauce
Add a splash of red wine while simmering
Stir in a little sugar or honey if the sauce tastes too acidic
Add a pinch of salt and black pepper to taste
Add cooked mushrooms, onions, or bell peppers
Add browned ground beef, sausage, or meatballs
Stir in a splash of pasta water before serving
Finish with a drizzle of good olive oil
Add lemon zest or a tiny splash of balsamic vinegar for brightness