Xcode

Executable Properties
-com.apple.CoreData.SQLDebug 1 NSDebugEnabled YES MallocStackLogging YES NSZombinEnabled YES
 * arguments on launch
 * Variables to be set in the environment

Files

 * http://developer.apple.com/library/mac/#documentation/DeveloperTools/Conceptual/XcodeProjectManagement/130-Files_in_Projects/project_files.html

PCH

 * http://www.meandmark.com/xcodetips.html

PList

 * http://forum.soft32.com/mac/XCode-location-info-plist-file-ftopict45385.html

Targets

 * http://www.google.com/search?aq=f&sourceid=chrome&ie=UTF-8&q=xcode+default+target
 * http://paulschreiber.com/blog/2009/03/04/howto-set-the-default-target-in-xcode/

Interface Builder

 * http://developer.apple.com/library/mac/#documentation/DeveloperTools/Conceptual/IB_UserGuide/Layout/Layout.html

Organizing Code

 * http://akosma.com/2009/07/28/code-organization-in-xcode-projects/
 * http://www.sodeso.nl/?p=822
 * http://www.blumtnwerx.com/blog/2009/04/xcode-workspace-setup-for-oolong/

Templates

 * http://guides.macrumors.com/Creating_Xcode_project_templates
 * http://arstechnica.com/apple/guides/2009/04/cocoa-dev-design-your-own-xcode-project-templates.ars
 * http://www.iphonedevfaq.com/index.php?title=Xcode_Project_Template

Unit Testing
Double click 'Run script' under 'Targets'/'Your script target name' then type "${SYSTEM_DEVELOPER_DIR}/Tools/RunUnitTests" 1> /tmp/RunUnitTests.out
 * http://blog.jayway.com/2010/01/15/test-driven-development-in-xcode/
 * http://mobileorchard.com/ocunit-integrated-unit-testing-in-xcode/
 * http://stackoverflow.com/questions/2002330/implementing-unit-testing-with-the-iphone-sdk
 * http://developer.apple.com/library/mac/#documentation/DeveloperTools/Conceptual/UnitTesting/1-Articles/CreatingTests.html
 * http://stackoverflow.com/questions/2002330/implementing-unit-testing-with-the-iphone-sdk
 * http://stackoverflow.com/questions/2002330/implementing-unit-testing-with-the-iphone-sdk
 * 1) Run the unit tests in this test bundle.

"If you need the application delegate, you have to run the unit tests on the device itself and not the simulator. Also, you will see unit test output appear in the console, not in the build results." According to Apple's documentation, there are 2 kind of unit tests, logic tests application tests. The application tests are working only on hardware device. If you're using simulator, it won't work.
 * http://stackoverflow.com/questions/1092396/iphone-retrieving-resources-for-logical-unit-tests
 * http://stackoverflow.com/questions/3190201/iphone-sentestingkit-failing-to-find-appdelegate-in-unittestbundle-target
 * http://developer.apple.com/library/ios/#documentation/Xcode/Conceptual/iphone_development/135-Unit_Testing_Applications/unit_testing_applications.html
 * http://blazingcloud.net/2010/02/20/test-driven-development-for-iphone/

Do not compile
"To silence the warnings, remove any JS files you see added to the Targets → → Compile Sources folder."
 * http://aralbalkan.com/2161