Member's tip from Paul: The surgeon's knot is a simple modification to the reef knot. It adds an extra twist when tying the first throw, forming a double overhand knot. The additional turn provides more friction and can reduce loosening while the second half of the knot is tied. This knot is commonly used by surgeons in situations where it is important to maintain tension on a suture, giving it its name.
Whether you are tying tiny line for rigging on your model or tying up a package for the mail this knot will save you from having to call your lovely wife to hold the knot while you complete the second turn.
Image courtesy of wikipedia
Confederation Marine Modellers