Using mindmap as testing tool - http://lisacrispin.com/wordpress/2011/02/28/using-mind-maps-for-test-planning/

Chat about exploring test - http://www.developsense.com/blog/2011/01/exploratory-testing-or-scripted-testing-which-comes-first/

How to effective use notebook with exploratory-testing - http://www.developsense.com/2009/04/exploratory-testing-recording-and.html