A couple of new knot that I have learned.

Clove hitch:
Along with the bowline and the sheet bend, it is often considered one of the most common and important knots. In sailing it is often used to initially position a fender hanging from a rail.
With certain types of cord, the clove hitch can slip when loaded. Also with smaller diameter cords, it may become difficult to untie after being heavily weighted.
Fisherman's bend:
The Fisherman's bend or Anchor bend is a knot used for attaching a
rope to a ring or similar object.
