The idea of best practices is becoming an anachronism — given today's complex technology landscape, the notion that there can be a single best way of doing anything seems fanciful. Our crew explore the thinking behind sensible defaults: that there may be some practices which act as de facto starting points on any given project because they're effective — practices such as pair programming, TDD or continuous integration. But context is vital and there may be circumstances which makes the default choice invalid — or at least suboptimal.