There are plenty of web sites and online courses on the Internet, helping beginners to conquer Excel. Here are some of them:

About everything possible in Excel

chandoo.png

Blog, community, collection of various templates Excel workbooks with dashboards, formulas, methods, tips and tricks, macros etc. Founded and supported by Purna Duggirala (aka Chandoo).

contextures.com

Site of Debra Dalgleish stores loads of useful info for Excel users of any level. Daily tips and tricks, RSS, tutorials and much more. Ever wanted to become a master of Pivot Tables? Debra has released 3 books about pivot tables! In her blog you will definitely find everything you need to know about such powerful things as Pivot Tables.

professor-excel.com

Site of Henrik Schiffner, management consultant and software developer. He specializes on data analytics and everything around Microsoft Excel. Henrik shares very practical tips and solutions. Check out his tips on how to speed Excel up and find out why German and Russian versions are much slower in Performance Excel Study.

Visualisation

http://peltiertech.com/

http://www.andypope.info/charts.htm

VBA focused

analystcave.com

The Analyst Cave contains tons of material on VBA that relevant for beginners and experienced Excel users. There you may find tutorials, samples, VBA cheat sheet, addins and more.

http://www.cpearson.com/

http://wellsr.com/

to be continued…

Non English sites:

На русском

http://planetaexcel.ru