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
Remove Excess Audio/Video from a Pear Note
If you ever find yourself in a situation where you used Pear Note to record a class or meeting, then forgot to stop the recording and ended up with an extra few hours that you didn't want, don't worry. You can crop off the extra recording. Just move the playhead to the end of what you want to keep, then select Crop Recording From Here from the Edit menu.
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How to Replace a MacBook Air’s SSD