4 ways to sound more natural when you speak English

A student said to me recently "I want to sound more natural." I've heard that a few times before. I've shadowed myself (if that's possible) and have a list of 4 useful ways to sound more natural in English. Remember, I am British and these things are from my perspective. I don't represent all native speakers however I feel all of my points are used widely enough to be very useful.