Have a read of Alex Partridge talking on the BBC website. Some simple, effective quotes about making sure that you’re not handicapping yourself by focusing on the wrong thing at the wrong time. How good are you at focusing on the stuff that really matters and making sure that you’re not going “slower and slower” by letting the external noise and distractions come in.
Your job is probably hardly to filter out the incoming noise, as you don’t have the direct equivalent of getting into a but and focusing only on the process of racing. However, by being aware of your different performance challenges and your typical environment, you’ll be able to challenge yourself to stay fully focused on the right stuff and blocking out the unhelpful stuff.