Links

*The* site to go to for anything N scale: NScale.net

Sites with various tutorials:
http://users.iafrica.com/c/ca/caroper/tutorial/index.htm
http://riptrack.net/

Electrical & DCC resources:
Wiring help: http://www.brian-lambert.co.uk/Electrical.htm
Digitrax DCC Help: http://www.traintekllc.com/category/digitrax-hints.html
Decoder installation procedures: http://www.tcsdcc.com/Customer_Content/Installation_Pictures/N_Scale/N_Search/search.html
Wiring switch machines: http://www.newrailwaymodellers.co.uk/electrics-switches.htm

Layout design:
http://www.layoutdepot.com/index.ihtml
http://www.layoutdesigns.com/
http://carendt.com/microplans/index.html
http://www.cke1st.com/m_train2.htm
http://www.thortrains.net/npoorx.html
http://www.wymann.info/ShuntingPuzzles/
http://www.xtrkcad.org/Wikka/HomePage

Sites by fellow N-scalers:
http://www.alligatorlines.com/
http://davidchiasson.ca/park/railroad/railroad2.html
http://siskiyou-railfan.net/e107_plugins/content/content.php?content.26
http://www.upmodelrailroad.com/

Online Stores
Rare earth magnets: http://www.rare-earth-magnets.com/c-6-block-magnets.aspx
Rare earth magnets:  http://www.kjmagnetics.com/products.asp?cat=11
Possibly the best online hobby store (they have more than just locomotives, just click on the online index link on the upper right corner): http://www.blwnscale.com/
Best prices for DCC products: http://www.sodigi.com/
Another good online hobby store specializin in N scale: http://www.nscalesupply.com/
Ready-made layouts: http://www.iblproducts.com/
Small tools: http://www.micromark.com/
Train elevator display: http://www.ro-ro.net/