So I have meant to start this thread before and ask this question and the Winter Wiki Writers competition has inspired me to make this an article for the Wiki in the hope it will help many more future Bonsai artist take some of the right steps early in their journey.
So what are the best pieces of advice you would give to the serious beginner, some one who wants to understand what makes Bonsai good and needs to have the right techniques, advice or mind set to grow

1. One that jumps instantly to mind is the great thread Neil (Shibui) has done on Trident root pruning. What I have taken strongly from that is if you do it right and from the beginning you get better results and far quicker.
2. Another is something Grant Bowie said at this years Symposium on Native Plants as Bonsai was "Some trees have a story to tell, some you have to write it for them." Or along those lines anyway.
3. And probably the one I'm still learning is to let it grow. Rather than trim it all the time, KEEP YOUR HANDS OFF IT. Trim it when it needs it. Especially if it is young. Something I have heard a bit is that if you can't help yourself buy more advanced trees that need maintenance and through your sticks in the ground. Or simply put,
4. Roots, Trunk, Branches, Leaves.
Anyway, I have a few more but I'ld also love to hear from everyone else, either a beginner who has had an epiphany moment, or someone more experienced with advice they wish they knew 20 years ago.