I have been using agile techniques from when they were called "iterative development" through XP (extreme programming) up throught the current agile manifesto. Experienced using tools to develop constant integration and deployment. Use test-driven development and design whenever possbile and necessary. Despite working remotely for 20 years have successfully used various interactive tools to attend standups and keep the communication conduits flowing. Been through the rigors of waterfall into the lighter weight world of iterative, XP and now Agile development. Change is inevitable, so we need to be as light as is reasonably possible while maintaining accuracy and reliability. I've developed systems before and after the use of test-driven development and believe all environments benefit from as much TDD as they can handle. This means automated builds, daily deliveries, test suites. Without these refactoring is only done when it cannot be avoided and quality suffers. TDD is an essential best practice