How to make spaghetti. First you are going to want to boil water. Next place the spaghetti in the boiling water. When the spaghetti is soft and springy you can drain the water. In a separate pot or pan place butter and sauce and let that boil a little while. When the sauce is hot enough place the spaghetti stings in there and mix. Keep the heat on a little. Serve on a plate with cheese and you're done.