If you want to work/compare a couple of documents, it can take as long arranging the windows as it does to do the job. Well this very useful tip (thanks, again, to lifehacker.com) tell Windows to do it automatically.

Hold down the Ctrl button and then left-click on as many documents as you want to see at once (word to the wise - don't go made, even on a widescreen monitor). Once they are selected, right-click on one of them and select Tile Vertically or Tile Horizontally.

If I may add a tip while we're learning more about the Task Bar, it can also be used when dragging and dropping items between windows. Those of us with widescreen or dual monitors find it easy to have both windows visible at a time but if you are working on a single monitor, drag the item to the button for the program in the Task bar and pause. The program should then appear on top ready to have the item(s) dropped on it.