This blog post from David Pogue of the New York Times offers some useful tips for how to extend iPhone battery life. Nothing truly surprising, but it’s a great reminder to check on push, location, and notification settings to make sure you’re not allowing apps to waste battery life working unnecessarily in the background. follow link
Find Your Mac's Serial Number
Want to check your Mac's serial number quickly and easily? Select About This Mac from the Apple menu, and click on the text directly below "Mac OS X" that reads "Version 10.x.x." Click once and you'll get a build number which is more specific information about the software. Click twice, and you'll get your Mac's serial number.
Visit MacTipster Blog
Pogue’s Tips for Extending iPhone Battery Life