The free Best of SQL Server Central Vol. 3 PDF contains a lot of useful information:
64 of the highest rated technical articles published by SQL Server Central, covering every aspect of SQL Server development and administration: T-SQL programming, Disaster Recovery, BI, Reporting Services and ETL, Database Design, Performance, Security, XML and more.
220 pages of sharp, clear and code-tested solutions to SQL Server problems and challenges in easily printed PDF format. 52 of SQL Server Central's most incisive writers in one book!