Microsoft+Excel+Help+costaf2

http://www.microsoft.com/atwork/skills/tipsexcel.aspx#fbid=yprT7so4k4F

Basic tips and tricks with Microsoft excel

http://excel.tips.net/C0144_Shortcut_Keys.html Excel keyboard shortcuts

http://www.maximumpc.com/article/how-tos/cheat_sheet_12_tips_and_tricks_microsoft_excel Top 12 tips for excel

http://spreadsheets.about.com/od/excelformulas/ss/formula_begin.htm Formula tips for noobs