Whenever other columnists here write really good columns, I sit at my computer and swear a blue streak, for I am a jealous god. Sacco, damn him, turned out a great article on the basics of elemental shamans, and for a while I've been kicking around bits and pieces of 101-esque columns for all four druid specs. This was the last shove I needed to get that done. While I expect our new balance blogger (a.k.a. Murmurs, the person I will be forcing to do all my number-crunching in the future with bribes or, when necessary, threats) will address moonkin, I'll cover bears, cats, and today, trees.
A quick note on what I want to accomplish here: I'm addressing this to people with no prior knowledge of the spec who want the tools to become reasonably competent healers quickly. By necessity, that means we're going to gloss over a few finer points; this is a cheat sheet, not an encyclopedia. When I say (for example) that Improved Tranquility needs to be dragged out behind a barn and killed with an axe, I'm not going to spend paragraphs explaining why that is, or examining situations where you could actually get some use from it. If you think I've glossed over something truly important, please drop a comment and I'll direct readers to anything they really need to know.