Donald,
Congrats on the job.
When I first started tree work in 1997 I was an adrenaline junkie. I quickly learned that tree work and being a daredevil don't mix.
I remember when I first started wondering what would happen on certain cuts etc. etc.
I had a ton of close calls because I was going to "chance it".
One time I was climbing a tree that I had no business being in without a second time in point off of another tree. The tree ended up breaking and I fell down with the top still tied into my belt. Thankfully I only fell about 12 feet and didn't break anything.
However, it knocked some sense into my head enough to make some calls and find out how to do it right.
This was before the Internet and I really had no idea who to call so I just called my competitors and started asking questions.
I don't know who it was who I talk to, but now I really wish that I did so that I could thank him, but he told me one thing that has kept me alive in many different situations:
In tree work you can't "think" something is going to happen, you have to "know" that it will happen.
If you live by that rule as your learning, you will quickly see the ways that trees behave as you are cutting them.
Unfortunately, I don't always live by this rule. Here is an example where I didn't
http://www.youtube.com/watch?v=HRILH4mNjIo and I almost paid with my life.
It could me about 2 1/2 or three years before I could swallow my pride enough to post this video, because it was such a stupid cut to make.
Anyway, what I've learned is that by being humble and hearing your mistakes you can help others not make the same ones.
Be safe and always remember that: In tree work you can't "think" something is going to happen, you have to "know" that it will happen.
Danielson = learning