There are hundreds if not thousands of great resources for learning and continually improving. These are a few of my favorite ones.

DW, BI & ANALYTICS

SlideShare Decks http://www.slideshare.net/idigdata
Amazon AWS Cloud https://aws.amazon.com
KDD-Nuggets http://www.kdnuggets.com
APQC KPI and Process Benchmarking http://www.apqc.org
Python Org https://www.python.org
R Statistical Computing http://www.r-project.org
R Bloggers http://www.r-bloggers.com
SQL Server Pro Mag http://sqlmag.com
Data Visualization http://www.perceptualedge.com
Telling Stories With Data http://data-stories.com
INFORMS https://www.informs.org
B-Eye Network http://www.b-eye-network.com
Information Management http://www.information-management.com
Database Journal http://www.databasejournal.com
Tableau http://www.tableausoftware.com/
Qlik http://www.qlik.com/
Spotfire http://spotfire.tibco.com/
Analysis Tookpak for Excel http://office.microsoft.com/en-us/excel-help/
Electronic Statistics Textbook http://www.statsoft.com/textbook/stathome.html
SAP Community Network http://scn.sap.com/welcome
Open SAP https://open.sap.com
Oracle Technical Network http://www.oracle.com/technetwork
IBM Technical Community https://www-304.ibm.com/communities
SAS Community http://support.sas.com/community
Apache Hadoop http://hadoop.apache.org
Apache Spark http://spark.apache.org

BOOKS

Business Intelligence Roadmap by Atre
Enterprise Analytics by Davenport
Developing Analytic Talent by Vincent Granville
The Visual Display of Quantitative Information by Edward Tufte
Information Dashboard Design by Stephen Few
Now You See It by Stephen Few
Show Me the Numbers by Stephen Few
Data Mining: Practical Machine Learning by Ian H. Witten and Eibe Frank
Data Preparation for Data Mining by Dorian Pyle
Data Mining with R by Torgo
Data Mining for the Masses by Matthew North
R Cookbook by Torgo
R for Business Analytics by Ohri
R in a Nutshell by Adler
Power Query for Excel by Chris Webb
The Data Warehouse Toolkit Collection by Ralph Kimball and Margy Ross
Building the Unstructured Data Warehouse by Bill Inmon
Hadoop the Definitive Guide by White (O’Reilly)
Programming Pig by Gates (O’Reilly)
Programming Hive by Capriolo, Wampler, Rutherglen (O’Reilly)
The Lil SAS Book for Enterprise Guide by Slaughter and Delwiche
SAS Certification Guide  BASE Programming by SAS
Data Analysis Using SQL and Excel by Gordon S. Linoff
SQL Server Internals
by Delaney, Randall, Tripp, Cunningham and Nevarez
Excel for Scientists and Engineers
by Gerard Verschuuren
Excel Advanced Report Development by Timothy Zapawa
Excel 2013 Data Analytics and Business Modeling by Wayne Winston
Mastering Technical Mathematics by Gibilisco and Crowhurst

ORGANIZATIONS

ACM Association for Computing Machinery http://www.acm.org
TDWI The Data Warehousing Instistute http://tdwi.org
INFORMS https://www.informs.org
PMI Project Management Institute http://www.pmi.org
PASS Professional Association of SQL Server http://www.sqlpass.org
PASS Excel http://excelbivc.sqlpass.org