Take a saucepan, fill it with water and bring the water to the boil. When it is boiling, add the egg (in its shell) to the pan of water, and continue to boil for 3-4 minutes. Best results obtained by using an egg timer.
Timing is everything! To get the perfect soft boiled egg, let the egg cook for only 3 minuted after the water starts to boil. Stop the cooking by removing the egg and running under cold water.