Dan Frakes at Macworld details the steps for creating a bootable installer disc or drive for Mac OS X 10.7 Lion, which is important especially for Macs that debuted after the release of Lion (as they don’t include a downloadable version of the installer). While nicely thorough and practical, it’s also notable for a hair-raising maneuver to avoid re-installing Mac OS X and zapping your Mac’s PRAM. follow link
Sleep (and Lock) Your Screen
When you are walking away from your computer, it's fairly common practice to start your screen saver and lock your screen. But did you know that there is a built-in keyboard shortcut in Mac OS X to sleep the screen?
Press Control-Shift-Eject and your monitor sleeps without engaging the screen saver.
- ExtraBITS for 13 February 2012 (13 Feb 12)
Action-Packed Instructions for Creating a Bootable Lion Install Drive