This is a handy tip if you just want to donload and install Sql Server Management Studio on a machine: Get Just The Tools: SSMS Download | Strate SQL.

you can download just the management tools through the Microsoft® SQL Server® 2012 Service Pack 1 (SP1) Express download page.  Just select either SQLManagementStudio_x64_ENU.exe or SQLManagementStudio_x86_ENU.exe from the download options and you’ll have the full version of SSMS at your fingertips; in about a quarter the size of the full installation download.