How to generate population script from existing data?

From SQL Management Studio
1. Select database
2. Right click and choose Task
3. Choose generate scripts
4. Choose objects
5. Select specific database objects
6. ... Go to advance. In General block choose 'Data Only' for type of data to script.

UnitTest code generation in VS2012

You can generate unit test by running command EditorContextMenus.CodeWindow.CreateUnitTests.
How
In option go to Keyboard left side menu. Search for the command. Put for instance unittest.  Add keyboard mapping to the above command. For instance assign it to the command Ctrl+Shift+?
Open you file and press you shortcut keys.

Unit Testing review

Writing Great Unit Tests: Best and Worst Practices
Good article that examine Unit Test and its value in Development process and testing.

Tool list from Scott Hanselman

Scott Hanselman's 2011 Ultimate Developer and Power Users Tool List for Windows