These days, Brian Pennie is a speaker and lecturer with a PhD in neuroscience from Trinity College, Dublin, as well as the author of Bonus Time – but a decade ago he was in a very different place as he struggled with a 15-year addiction to heroin.Brian joins Keith to discuss habits, specifically how we can overcome bad habits and replace them with good ones.His story is remarkable, and it’s hard to imagine someone better suited to this topic.Learn more about your ad choices. Visit megaphone.fm/adchoices