Layouts
The Micro/Small Layouts
 for model railroads is home to the Small Layout
  Scrapbook.  It is full of pictures and ideas from small layouts
  around the world.  Another section at the same site has a set of
  instructions
  to build
  your own
  turntable 
 from a CD, and has
  a N
  shelf
  layout 
 using a similar turntable.For T-Trak information start with the Official T-Trak
 site and then continue on with
  the Unofficial
  TTrak Handbook 
.  Finally
  the Australian
  T-Trak 
 group has a good guidelines document.The Northern Virginia NTRAK
 club has
  a T-Trak
  division 
 with a gallery of their modules.  For more examples visit
  the Roseville
  Roundhouse MRR
  Club 
 and look at their
  modules. These t-trak
  modules 
 have great examples of sky boards that are something
  other than plain blueThe T-Trak Yahoo group has a collection of photo albums. I like the one by Rob from Australia with the two different stations.
Another modeler, also from Australia, has been building single track modules using the standard modules. He has a blog called Adventures in N Scale Model Railways.
These sites feature N scale trains and paper model kits from scalescenes.com. The first is a small show display layout
.  The second
  is Ardley
  Bridge 
 as seen in a gallery of photos featuring it and a variety
  of other model railroad projects.This site, Papphausen
, has a lot of interesting pictures and information
  gathered from the author's many model railroad layouts.  He also has
  a great section
  on scratch-building 
 using paper and cardboard.This waterfront layout
 by Kaustav has some very interesting examples of scratch-building,
  from oil storage tanks to cranes to ships.Another spin on the T-Trak standard comes in the form of these amazing Japanese modules that use a single track instead of double. Also the Japan Rail Modelers of Washington DC have an article about building these mini-modules.
Prototype
The Alexander RR
 is a short line in central North Carolina.The Carolina Coastal Railway (CLNA) operates a line between Raleigh and Plymouth, NC as well as switching services in the Port of Morehead City. Has interchanges with NS and CSX.
Goods & Not So Goods
 is a UK web site that covers a lot of the history and
  technology of railroads, including common loads and how they could
  be modeled.  Also has a list
  of line side
  industries 
 and suggestions on how they could be modeled.North American Signaling
, by Carsten Lundsten, explains the basics on signaling
  and safety rules.Port Jervis Line
 is a single-track commuter rail line in New York, used by
  Metro-North Railroad and NJ Transit.From the Skyscraper page forum comes a photo essay titled Suburbia
 with pictures from around Hamilton, Ontario.  Of
  particular interest to me was the strip mall.Useful dimensions
 for general design drawing.  By Roymech.co.uk.More dimentions can be found at the Dimensions Guide web site.
Retailers
Hobby Chest
 is a shop in Jacksonville, NC.Laserkit.com has wooden kits from American Model Builders, Inc.
Model Train Stuff
 is an on-line retailerThe Scale Models Division
 has signals, laser cut structures, and vehicle
  accessories (trailers, campers, etc.).Train Buddy
 is in Wake Forest, NC
Rolling Stock, etc.
From the 2-Guyz site comes this amazing thread
 about scratch building a steam locomotive.On the Whistle Post Rich C posted a how-to build a N scale track cleaning car from an old 40 or 50-foot boxcar. There is another similar method on the Railhead Photography web site, the main difference being the beveled edges and the fishing sinkers for weight.
Scenery Tips
Yellowhead Railway Co.
 by Dan Crowley.  Asphalt roads, easy trees, ground
  throws, etc.Check the All Model Railroading
 archive
  for scenery
  tips 
, including
  a method
  for concrete
  roads 
 by enjineerbill and a method
  for making
  conifer
  trees 
 by Tileguy.These are links to construction threads featuring buildings. The first is an industrial building
 made from styrene and card.Simple pine trees
.  Bigger evergreen
  trees made from
  dowels 
.A tutorial
 for making ground foam with a blender.
  Another tutorial
  can be found at the 2 Guyz site.This is an old page on making chain-link fences that is hosted by archive.org
Wire armature trees are exibited in this great thread
 by scotchpine on
  the Railroad Line
  Forums 
.The Whistle Post has a recent thread about making trees using floral wire, jute twine, and ground foam. What I like about these is the variety the poster achieved by combining different shades of twine with a variety of ground foam colors, as is illustrated in the second picture of the first post.
Track Work
See this video
 for an example of soldering tracks together.Build a Clinometer
 to measure inclines.A tutorial from Fifer Hobbies on how to make a custom length of Unitrack from a longer piece.