Harbor House is also open 24 hours.  There is one in Dana Point and one in Huntington Harbor both on PCH (Pacific Coast Highway).  They specialize in omelets which are actually not bad.  They have a wide range of other foods too.  They're pretty good especially for a 24 hour place.

Directions: Simplest Directions. Take Warner west from the 405 until you get to PCH.   Like 5 or 6 miles.  Turn right at PCH.  Harbor House is on the left about 1 mile down PCH.  If you see a tall water tower like structure (it's actually a house) you've gone about 100 feet too far.