When you learn different ways to train its all good to get an idea on what to do, how it works for you in certain times but in the end; hiding behind a book or a DVD won't bring you full training success. In order to get the best out of your training is to follow your own path while learning your ideal methods to help you find the success you want to achieve. A DVD won't always give you results because you're following someone else's pace and rhythm while you aught to learn how your own body suits certain aspects of a program. A book can only take you so far until you realize it won't always help you in your favor.
Be open to ideals that can have you follow your own path as you train within your own style and goals. Breaking the rules doesn't mean shrugging off everything and being "rebellious", it's about not restricting yourself into the palm of someone else's hand. Some will tell you to follow your own path but are secretly getting you to follow them to boost their ego and have you splurge the good money you earn. I have had many mentors in the last decade but I don't worship them as fitness gods or allow them to dictate my success, I learn from their ideals but develop my own style that suits my personality, my body's energy and interest. Rebel by being your own person while learning what works for you.
There are some courses out there that don't want you to go to failure exercise wise and yet others will tell you going to failure will have you reach the pinnacle of your will to "beat" an exercise or system. Which one should you choose? I'd say go in the middle and pick your moments of when to test your abilities and when you go with the flow and challenge yourself but to a degree. Breaking the rules is not about who to stand up against but about making a decision that pits you in that unique group that see's not the right or wrong way but going beyond that and daring to do things that bring you a sense of self-awareness and individuality that bring you the success you crave.
You can learn from others what can be helpful but yet your way of training is a gift and it's something that you can own for yourself and not allow those assholes in the mainstream to tell you if you do this it's wrong or that your way of training is not up to their standards. You are one person finding their way and it's never an easy path due to what you may have been exposed to. I fell for it a lot trying to follow someone else's path and it kept making me frustrated. Their way is their way period. The way you do things is your choice, you choose who to learn from, where to get ideas and what style you settle for that bring you success or failure. Don't be afraid to fail and make mistakes, it's finding who you are and what makes you unique. Break the rules, it's not only fun but it exposes what's a lie, the truth and the reality of what things come about.