Jeff, I would suggest you try some of these web locations...
Kato has some nice plans, click on "Unitrack" from
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then click on "Track Plans" down the left side under "N Unitrack". You don't have to be using Unitrack to make these plans, they are just for inspiration. But, if you do use Unitrack then you have the option of taking apart and redesigning your layout as often as you want.
A Google search for "N Gauge model train layout plans" should yield some interesting links or download some track planning software and design your own layout - check out
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it has design software (for Windows) and it's pretty good bang for the buck.
If this doesn't yield some possibilities then check out what the local hobby shop, library or club has in the way of magazines and publications.
Pete