Know your strengths and weaknesses - and understand everyone has them!
When you first start out, and even as you continue, it's easy to believe that everyone is doing a much better job than you. Truthfully, there will be some things that people are more successful at than you and I, but there are also things that they struggle with. Get to grips with your strengths and weaknesses as your first step in building yourself.
Ask questions, but expect no concrete answers.
My entire career, I've maintained the very evidence-able fact that, with the thousands upon thousands of teachers that have existed, we still haven't found the 'best' way of doing this. This is a beyond clear indication that a mixture of approaches is paramount, and that the only way to tease out successful ideas is through discussion, yet there won't be a stand-out winner.
Trial and error will be your best friend, and your worst enemy.
You've spotted what you want to improve, and your colleague has suggested (and maybe even modelled) something different to try! However, much like Chinese Whispers, language often changes and instructions are open to interpretation. It should be common practice to test out theories with the reflective behaviour to analyse it afterwards. But the insecurity of failing often holds us back. Consider this, what if you quit too early on the most successful plan?
Give back - because you have a lot to offer.
As much as you should want to learn from others, put yourself in a position to teach as well. Imagine an ethos so open, that any person could go up to anyone else for advice or feedback. Take feedback with the action it deserves and make good use of it. Again, trial and error will let you know whether it was quality feedback or not!
Keep positive and trust your gut.
Negativity is infectious and by associating too often with a negative mindset, you can undo all of your hard work. Have a vision and stick to it - but understand the method of achieving it is malleable. Your immediate teaching idol may turn out to be someone different. Experience will shape how critical you become, the kinds of ideas you take on board and therefore decide what opportunities you might miss. Keep an open-mind when it comes to building your artillery. Everyone has something to offer.