2. The Screen Gets Scratched
Instead of using a finger to interact with the tablet, you can use a soft-tipped stylus for greater accuracy and to create the feel of using a pen to write on your tablet's screen. However, never use an actual pen or pencil, or any sharp object for this purpose.
The best way to prevent your iPad's screen from getting scratched is to take preventative measures in advance. This includes purchasing an optional clear protective film that gets placed over the tablet's screen and can be kept on the iPad permanently.
Available from a variety of companies, including Zagg (http://www.zagg.com/invisibleshield), 3M (http://www.3m.com/ScreenProtectors) and BodyGuardz (http://www.bodyguardz.com), for between $29.00 and $49.99, these extremely durable, yet thin (.01 inch thick) films are made from military-grade material that is scratch- and puncture-resistant. While protecting your tablet's screen, they will not reduce the clarity of the screen, or its touch-screen sensitivity and accuracy.
While your iPad is being transported, consider also investing in an Apple Smart cover and/or another type of cover or case that will protect the tablet's screen, and the entire unit, when it's stored or being carried in a briefcase, purse, backpack or messenger bag.
Also, only use a specially made micro-fiber lens cleaning cloth to keep your iPad's screen clean and remove fingerprint smudges. Do not use a paper towel, tissue or another type of cloth for this purpose.
If the tablet's screen does get scratched, it will need to be repaired or most likely replaced. If you have pre-purchased third-party insurance for your iPad, this repair will be covered (typically with a $50.00 deductable). Otherwise, you'll need to pay the full cost of the repair (up to $300.00) that's done by an Apple authorized service center.