There have been lots of mistakes made along the way, but I consider my self pretty "good" now. I have 4 heroics instances on farm, the only thing that is hindering my 5man progression is that I don't have much time to do it. Seems that I spend most of my time raiding on my resto shammie.

But, my one BIG failing is a pretty stupid one which keep getting me killed because I am too lazy to just fix it. Sometimes under the right circumstances I scroll to a differant action bar on all my toons but my tank, so it takes me a while to notice, and when I do it's almost always way too late. All I need to do to fix it is the change the keybindings a little.