When the built-in SSD in his MacBook Air failed, Macworld’s Dan Moren decided to try replacing it himself (surprisingly, at the suggestion of an Apple Genius). The process was easier than he thought, taking only 20 minutes. He explains what he did, and walks you through how to restore your data with SuperDuper, including a pointer to a handy utility that restores Mac OS X’s Recovery Partition. follow link
Move the Dock Quickly
You may find it convenient to move the position of the Dock when working in certain programs or with certain files. Rather than choosing a different position from the Dock preferences pane or using a submenu in the Apple menu's Dock submenu, you can move your Dock to a different screen edge merely by Shift-dragging the separator that divides the application and document sections.
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How to Replace a MacBook Air’s SSD