If you are using your iPad to store sensitive information, you can start a function that can remove all this information in case there is a wrong password entered ten times. Go to your settings, touch on general and choose the pass-code lock function. Use a code you'll not easily forget. You can as well get an ipad car charger to ensure that it is on at all times even when you are out of the office or home for long.
The current applications must be something that you pay attention to constantly. Some programs can continue to perform with other activities on the iPad.