I gave up hours trying to build a route, but I found that I was too strict with laying track exactly _ feet from the platform, so I gave up.
What can't be stressed enough, though, is to set the mood, theme, and feel for the era/location you're pursuing. When I (very occasionally) try to build a part of my route, I always have 5 or 6 tabs open in Google images, each cover many aspects of what the build outcome should look like. Each picture is also an example of what I'm going for when building, and has a train or few on the lines, which is the final goal of every route builder: to get a train running up the lines.
Pictures, pictures, pictures, or else you don't know what you want, and you can't get it.