I need to get some chores done, but instead I am cleaning up my bookmarks and re-reading bookmarked articles. Hopefully this is beneficial for you, since you now get to have a small collection of useful links. These are just a small sample of articles that I find myself going back to either for my own reference or to send to a client or colleague.
Indexing The Data Warehouse by Michelle A. Poolet; 06/30/2008
Importing Multiple Flat Files with SSIS by Amit Singh; 04/06/2010
SSIS: Case-sensitivity in Lookup component by Jamie Thomson; 02/12/2008
Removing Identical Duplicate Rows by William Assaf; 02/21/2012
When to Use NVARCHAR by Melinda Cole; 09/09/2011
The Data Quality Audit by Michael L. Gonzales; 06/10/2004
SSAS 2008R2 Performance Guide from SQLCAT
Passing SSRS T-SQL values to SSRS MDX Parameters by Patrick LeBlanc; 12/01/2010
Color Has Meaning by Juice Analytics
Data Savvy 