Fix an app that isn't working properly in Nexus

Solutions:

If an app on your tablet isn't working properly, we recommend trying the following troubleshooting steps:

1. Check to see if there is an update for the app available in the Google Play store
2. Go to Settings > Apps, select the app in question, and then touch "Force stop."
3. Go to Settings > Apps, select the app in question, and then touch "Clear cache."
4. Go to Settings > Apps, select the app in question, and then touch "Clear data."Caution: Any data saved in this app will be erased.
5. Try uninstalling and reinstalling the app.
6. If you downloaded the app from the Google Play store, try contacting the developer of the app for further assistance.

To find the contact information for a developer of an app in the Google Play store:

1. Open the Google Play store and select the app in question.
2. On the app's description page, scroll down to the "Developer" section.
3. An email address, a phone number or a website will be provided.

 --- Cheers !!!

 Collected from : http://support.google.com/nexus/bin/answer.py?hl=en&answer=2668665&topic=2840575&ctx=topic