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The iPhone battery received the most troubleshooting requests by a wide amount during FixYa's FixMas report last year, accounting for 40% of user issues. With the newly released iOS 5.0.1 failing to fix the issue for many iPhone owners struggling with battery life, I figured it would be a good idea to break down some of the best ways to get battery life out of your phone.

The vast majority of these actions take place in the "Settings" section of the iPhone. They should be done in conjunction with one another in order to maximize battery saving effects:

• Turn off location services
• Turn off push notifications
• Turn down screen brightness
• Turn off Bluetooth and turn off auto-search for Wifi
• Do not leave your phone charging overnight-- when your phone reaches 100% battery power, take it off the charger
• Lock your phone regularly and enable auto lock (the shorter it takes for your screen to lock the better)
• Fetch new data manually (emails especially)
• Turn off Siri (4s users only)
• Turn off time zone settings

Please keep in mind the historical issues of this phone when attempting to solve your battery issues-- while the phone itself is a work of art and functions wonderfully, the battery is a huge issue and something that will be a problem for you even after you implement these fixes into your daily routine.

In other words, these tips are merely a way to get more juice out of your phone throughout the day. They will not fix your battery issues outright.

That is something only an OS update from Apple will be able to accomplish.

Let's say you totally forgot the password to log on to your Mac. Or maybe you purchased a used Mac from someone else and they've got it locked down. There are numerous ways to reset a password with no OS X discs

Reset 10.5 Leopard & 10.6 Snow Leopard password

1. Power on or restart your Mac.
2. At the chime (or grey screen if your chime is turned off), hold down Command+S on your keyboard to enter single-user mode.
3. This step is optional, but it's a good idea because it checks the consistency of the hard disk before moving on. At the prompt, type fsck -fy and press Enter/Return. Wait for the checks to complete before going to the next step.
4. Type mount -uw / and press Enter.
5. Type launchctl load /System/Library/LaunchDaemons/com.apple.DirectoryServices.plist and press Enter.
6. Type ls /Users and press Enter. This lists all of the usernames on the computer - helpful if you don't know or remember what these are.
7. Type dscl . -passwd /Users/username password and replace "username" with one of the users displayed in the previous step. Replace "password" with a new password of your choice. Press Enter.
8. Type reboot and press Enter.

Reset 10.4 Tiger password

1. Power on or restart your Mac.
2. At the chime (or grey screen if your chime is turned off), hold down Command+S on your keyboard to enter single-user mode.
3. Type sh /etc/rc and press Enter/Return.
4. Type passwd username and replace "username" with the short name of the user account for which you'd like to reset the password.
5. Type your desired password and press Enter. It won't show itself on the screen, so be careful what you type. You will most likely have to enter it again to confirm.
6. Type reboot and press Enter

Tricking your Mac into creating a new user account

1. Power on or restart your Mac (should work for any Mac OS X system).
2. At the chime (or grey screen if your chime is turned off), hold down Command+S on your keyboard to enter single-user mode.
3. This step is optional, but it's a good idea because it checks the consistency of the hard disk before moving on. At the prompt, type fsck -fy and press Enter/Return. Wait for the checks to complete before going to the next step.
4. Type mount -uw / and press Enter.
5. Type rm /var/db/.AppleSetupDone and press Enter.
6. Type shutdown -h now and press Enter.

The third method of resetting your Mac's password requires some additional explanation. Rather than simply changing the password like the previous two methods do, this one fools the operating system into believing it has never been started before. This means when you restart the machine, it will take you through the entire setup & registration process all over again. Do not worry, all of your pre-existing data is still available. Just continue with this process and do not choose the option to transfer or migrate information to the Mac.
Once you're done, log in with your new admin account and go to System Preferences > Accounts. You may have to click on the lock icon in the lower-left corner before making changes here. You should see your original user account(s) in the left column. Try clicking on one of them to convert it to a standard user account (uncheck "Allow user to administer this computer") and change the password. You should be able to successfully log in to that account now and access all of your files and programs. If you want, you can log back in with your new admin account and re-check the "Allow user to administer this computer" option in System Preferences to grant admin privileges to the original user again.
That should cover it! As always, remember messing with single-user mode and Terminal is risky and may lead to trouble if you make mistakes. Considering you're already locked out of the computer, though, you'll probably be willing to take your chances at this point.
One last thing... if you have a Keychain Access password, you will probably need to reset that as well. You can do this by selecting "login" under Keychains on the left and choosing Delete from the Edit menu. You'll lose everything in the Keychain, but you'll now be able to start fresh and add new ones.