Originally Posted by Wogster

Okay here is what you do now, go let the air out of your back tire, and practise changing it, use the same tube, do it several times, when you stop thinking about the steps, you can stop. Here is the reality, flats rarely happen on warm sunny days when you have lots of time to spare. Flats commonly happen when it's cold, wet, dark and you need to be somewhere 10 minutes ago and your too tired to think. Making the process of dealing with a flat, automatic, means you notice the flat, get off your bike, and fix it without needing to think about it.