Windows 7 Tricks (Part - 1)

Windows & Task bar

[Alt] + [Ctrl] + left/right/up/down arrow
Flip Window

[Alt] + [Tab]
Cycle through open windows.

[Windows] + [T] OR [Windows] + [SHIFT] + [T]
Move focus to front or back of task bar. Press [T] again while holding the [Windows] key to cycle through items in the task bar from left to right or you can use arrow keys.

[Windows] + [B]
Puts focus on the ‘show hidden icons’ button on the system tray.

[Windows] + [1] through [Windows] + [9]
Launch first through ninth icon on task bar, including items pinned to task bar.

[Windows] + [SHIFT] + [1] THROUGH [Windows] + [SHIFT] + [9]
Starts new instance of respective task bar icon.

[Windows] + [Ctrl] + [1] THROUGH [Windows] + [Ctrl] + [9]
Cycles through multiple instances of the respective icon.

[Windows] + [Alt] + [1] THROUGH [Windows] + [Alt] + [9]
Opens jump list for respective icon.