Enable Mac to mount CD DVD on remote PC

Install DVD or CD Sharing Update 1.0 for Windows

$ defaults write com.apple.NetworkBrowser EnableODiskBrowsing -bool true
$ defaults write com.apple.NetworkBrowser ODSSupported -bool true

Multiple RSS feed in one view

Modifying Keyboard Shortcuts

Make sure your free space is really free heh

Creating smart folder

Always show up to date contents.

Where do the Library folder go?

Hold option key when viewing the Finder's Go menu.

Get album cover in iTunes

Accurate search with search tokens!

Narrow down and fine grain your search with search tokens.

Change images type with Automator

It's amazing how Automator can save your time!

Grab, capture my screen!

It has been there in Mac OS X since 10.4, Tiger.

Import option in Aperture :-)

Show file found by Spotlight without opening them

Command + click on the found file

Different Wallpapers on Multiple Desktops

Create more than one iPhoto Library

Use option key + click on the iPhoto and you can have more than one iPhoto Library separately.

View hierarchical location in Finder

Command + click on the Finder's window title.

Resize Safari view while in full-screen mode

Migrate Lion partition to overwrite Snow Leopard

maybe you have previously installed lion on different partition, make a lot of changes, app installation, and later you decided to stick with it. here is how to avoid re-installation over writing your old snow leopard:

1. install lion on external disk and boot it
2. do image scan with disk utility on your lion partition
3. use the image to restore and overwrite the snow leopard partition
4. change the name of the old lion partition

5. boot the new lion. when power up, hold option key
6. once in, use disk utility to remove the old lion partion and resize your new lion