Mind blowing things Windows 7 does that Vista doesn't
Shake them away
Ever had 10 Notepad, two Powerpoint and 50 Outlook windows open? Want to minimize all of them except the most important one? In Windows 7, you can grab the top of the window and shake it about to scare away all of the other open windows. Simple.
A step forward in previewing
In Vista, hovering over a minimized window on the taskbar would provide a preview of the window. In Windows 7, a similar preview pops up which also gives the option to close a window (within the preview), along with a full-size 'peek'. You can also press "Win" + "T" to scroll along previews in the task-bar.
A smaller preview, along with a full-size 'peek' with the ability to close the window
Snap into place
Simply drag your window to the left or right edge of the desktop to snap and resize the window to one half of the screen. Drag the window to the top to maximize it. A pretty neat idea made neater by the use of the keyboard shortcuts ("Win" + respective arrow keys). No longer do you have to frustratingly position the mouse at the edge of the window to resize it.