The LII site for legal citation is a very uselful resource on The BlueBook and legal citation in general. However, before consulting this site be sure to look at the BlueBook first and always use the BlueBook's citation form!
Not only is the LII Guide available online, but it is also available in different e-book formats. You can obtain a PDF version (which can be used on on Ipad, or any tablet, and on computers); or a version for Kindle; or a verision for Nook and other e-readers. To download in any of these formats just follow this link.
The LII site has a great guide for abbreviations & ommisions organized alphabetically. Also the guide links you directly to examples of how to correctly use the abbreviations.
The LII site has an alphabetically organized list of abbreviations for quick reference to Bluebook abbreviations and ommissions. Additionally you can link to examples of abbreviations used in actual citations for a more comprehinsive look at citations in use.
The LII online boook breaks down citation by category (i.e. e-sources, opinions, statutes, court rules, books, etc.) and gives the writer an easy to understand format of citation. The site gives concise examples with explanations in the form of citation principles to follow.