COOKING PASTA 101: Four Easy Steps to Pasta Perfection
#1 Never Crowd Your Pasta
In order for pasta to cook evenly it needs room to move. Crowding pasta in a small pot with not enough water will result in clumpy, sticky, unevenly cooked pasta. 
#2 Gernerously Season Your Pasta Water
Many Italians will say that pasta water should be “as salty as the Mediterranean sea”. Always generously season your pasta water with sea salt, not oil.