Microsoft Office blogs
Computer For All Best Place for to learn Microsoft office, Microsoft Excel, Microsoft Word, Microsoft PowerPoint.
Exceltrick.com is your one stop shop to learn all excel tricks, formulas, chartings & shortcuts. The goal of this site is to make you an excel geek.
Excel, MBA, and Consulting tips from a UCLA Anderson Graduate. There is not that many Excel articles but there is new content.
MrExcel is your one stop for Excel tips and solutions. MrExcel offers help for excel including seminars and other training.