My boss had a better slogan: JEDI (just effin' do it). We always took it to mean 'do it, don't just talk about it/don't ask permission, just get on with it'. Getting that JEDI mindset is important in lots of workplaces.

Back to the original point: don't wait. There are so many things you might be thinking of doing and saying 'When I get my new team...', 'When I get a free afternoon...', 'When I've fully mastered Rails testing I'll start doing BDD...'