Trying to put something into Bluebook form can be extremely tedious. Part of your job in law school is to learn to Bluebook properly. But once you are working for yourself, so to speak, you may be looking for an easier way to do it.
There are a few free tools for law students. The easiest of these is WestlawNext. When you select a block of text in WestlawNext it allows you to copy with reference. The default is Legal Brief format, put this can be changed to Law Review in the Preferences section of the screen. Citegenie is another free option. This is a Firefox add-on which allows you to click into a Lexis or Westlaw document and automatically generate a bluebooked citation. For more scholarly pursuits, like a paper, Zotero is a Firefox add-on which allows you to organize your research. It produces bluebooked citations for articles and books, but cases and statutes need to be entered by hand. It’s main utility is that it interacts with most scholarly databases. BU also subscribes to RefWorks but this database does not have quite as nice a Bluebook output.
There are many pieces of software out there which are trying to help you organize and cite your research, but they must all be purchased. Citestack is a Chrome app which allows you to organize and create citations for your legal research. Cit-R-Us is a software product that automatically bluebooks your citations. Westlaw has CiteAdvisor and Lexis/Nexis has Casemap which is not included in an academic subscription. For a list of citation software out there see this post.