Tools of the Trade
There are several tools of the trade that are favourites of editors. The first is Chicago Manual of Style. Now in its 16th edition, this style guide eclipses any contenders. Have a question about how to source an online quote that is anonymous--go here. Not sure how to prepare a reference list in APA style--go here. If there is one tool that you will need, this manual of style is it.
A second go-to style guide is published by EAC, Editing Canadian English. This guide will fill the gaps and provide a Canadian perspective that is not to be found in any other guide.
For dictionaries, a Canadian favourite is the Oxford University Press Dictionary of Canadian English, also available online. A good rule of thumb is to ask about your organization's preferred dictionary.
If you think editing might be a career for you...
Below are two links to questionnaires that might help you determine if editing is a career for you.
1. About.com Career Planning
Click on the title to learn some basic facts about editing, then take the quiz.
2. Editors' Association of Canada
This provides a realistic, helpful overview of editing in Canada.
Read your own compositions, and when you meet a passage which you think is particularly fine, strike it out.