Need to type and re-type certain phrases over and over again? Then why not use a keyboard shortcut so that you type faster and it saves your time. This feature is available in iOS 5 and 6, and you can set a keyboard shortcut easily.
1.Go to Settings > General > Keyboard.
2.Tap "Add New Shortcut..."
3.Enter a phrase, e.g. in my opinion
4.Enter a shortcut, e.g. imo
The next time you type a shortcut, e.g. imo, the system will suggest to expand it to a phrase that you've set.