Want to be an Excel guru at your office place? Or just impress the ladies with your mad vlookup and formula skills? The great people at InvestInTech have come up with the ultimate Excel cheatsheet and it’s awesome!!

Ultimate Excel Cheatsheet

OfficeTab is a really cool program that gives you a tabbed interface while working in Word, Excel or Powerpoint 2007. It’s free (though from a Chinese website) and is similar to the tabbed interface in the newest versions of IE, Firefox and Chrome. Definitely useful if you work with multiple files at once.

OfficeTab – Tabbed Document Support for Office

Ever heard of Sparklines? It’s a cool new feature in Excel 2010 that lets you create “mini-charts”, as you can see from the image above. It basically lets you analyze data in more ways and more efficiently. Want to quickly see a trend? Use Sparklines. Learn more below.

How to Use Sparklines in Excel

If you’ve ever worked with Excel files before, you’ve probably ran into the situation where you had to get rid of a bunch of blank lines or empty rows. There are several different ways to do it, but you certainly don’t want to go through and manually delete every blank cell or row! Read on to learn how to do it efficiently.

Remove Blank Cells or Rows in Excel

If you’ve ever tried to run a random office pool, or wanted to do a random giveaway for your website’s visitors, you’ve probably wondered the best way to randomly pick from a group of people.

The Productivity Portfolio runs down a quick way to generate a random number in Excel, combined with sorting a list to figure out a random item from the list. Hit the link for the full explanation. 

Use Excel RANDBETWEEN to Select List Names – Productivity Portfolio