Luke's English podcast is best consumed as part of a balanced diet. Listen freely and just try to enjoy and understand what I'm saying. Mix this with more formalized language study to get the full 360 degree effect. You don't have to necessarily note them down or study them, but you can just try to identify words, phrases and grammatical structures. Just be mindful when you're listening. It's a bit like being a Jedi. You just have to be mindful of the living force.