3 days before i started to use win7 64bit, it is really fast and stably.  I found this keyboard shortcuts for fast use

Master List of Windows 7 Keyboard Shortcuts (Mar 09)

Managing Windows

1. [Win+M] – Minimize all open windows
2. [Win+Shift+M] – Undo all window minimization
3. [Win+D] :- Toggle showing the desktop
4. [Windows+Up] – Maximize window
5. [Windows+Down] – Minimize windows / Restore
6. [Windows+Left] – Dock window to the left side
7. [Windows+Right] – Dock window to the right side
8. [Windows+Shift Up] – Maximize vertical size of window
9. [Windows+Shift Down] – Restore vertical size
10. [Windows+Shift Left] – Move window to left monitor
11. [Windows+Shift Right] – Move window to right monitor
12. [Win+Spacebar] – Aero desktop peek
13. [Win+Home] – minimize/maximize all inactive windows
14. [Alt+F4] - Close the active window
15. [Alt+Tab] - Switch to previous active window
16. [Alt+Esc] – Cycle through all open windows
17. [Win+Tab]- Flip 3D
18. [Ctrl+Win+Tab]- Persistent Flip 3D

Taskbar

1. [Win+Any number (1, 2, 3, .., 0)] – open the corresponding taskbar pinned program
2. [Ctrl+Click a pinned taskbar icon] – cycle through the program’s open windows
3. [Shift+Click a pinned taskbar icon] -run a new instance of the program
4. [Ctrl+Shift+Click a pinned taskbar icon] – run a new instance of the program as administrator
5. [Shift+Right-click on icon] – Show window menu (Restore, Minimize, Move etc)
6. [Shift+Right-click on grouped icon] - Show window menu (Restore All, Minimize All, Move All etc)
7. [Win+T] – Cycle through applications on taskbar (showing its live preview)
8. [Win+Shift+T] – As above, but in reverse order
9. [Win+R] - Opens Run dialog box

General

1. [Win+P] – show presentation mode projector options
2. [Win+G] – show desktop gadgets
3. [Win+L] – Lock computer
4. [Win+X] - Mobility Center
5. [Win++] - Zoom in
6. [Win+-] – Zoom out
7. [Win+=] – Magnifier

Windows Explorer

1. [Alt+P] - Show/hide Preview Pane
2. [Alt+Up] - Go up one level
3. [Alt+Left/Right] - Back/forward