If you use Google services such as Google Reader, Google Drive, YouTube, Contacts, Google+ Circles, Latitude, Picasa Web Albums and a few more, you can download all of your stuff to your computer.
If you manage a Facebook Page there is a very useful feature you might have missed. You can schedule your posts in advance or you can even date them back down on the Page timeline.
I'll show you the basic usage of IF function in Google Drive Spreadsheet. The IF function returns one value if a specified condition evaluates to TRUE, or another value if it evaluates to FALSE.
Some web pages have the Save image As... option disabled on a right click when you try to save an image. Let me show you how to get that image anyway using Firefox.
You can upload and import any MS Word document file to Google docs/drive as you can download and export a Google docs document to you computer and open it with MS Word.
TinEye is a great reverse image search online service, that can tell you where an image came from, find different sizes of the image and you can find out if someone is using your image without your permission.
Dropbox is an amazing cloud based web service enabling you to store your stuff like pictures and documents and access them from any device with an Internet connection. Plus you can share the stored items with others.
A real useful web service for all the designer who want to know what colors have been used on a certain image. You can even download a Photoshop Swatch file containing the color palette of the image.