Digital BW, The Print

This could indeed become a bottomless pit, however I would welcome a 
somewhat more shallow pit of tips specifically related to traditional "wet" 
darkroom techniques.  I learned a ton from the burning and dodging thread.

I for one would love some pointers on sky replacement.  Specifically, how 
to make and control the selection into which the sky is inserted and how to 
conceal the foreground/background boundary.  Treelines, for example.  How 
do you deal with such a complex boundary?

Peter McLennan