I know this question is a bit old - but for anyone stumbling across it in the future...
With your application loaded In Visual Studio (I'm using VS 2013 Update 4), click on the following
Build > Configuration Manager
On the main solution project, set the Platform to Android - This should create a compiled APK in you build output folder (Solution\bin).
The easiest method I've found to install apps is using a manual method - coping it to the device and executing it from there.
To install the app on your Android device you will need to allow the device to install apps not found in the Google Play Store.
Go to System Settings > Security > and select the "Unknown Sources" option. (The location of these settings might vary depending on device and Android Version)
You should then be able to copy the apk to the device, and navigate to the file in any File Manager type application. Once you tap on it it should start the installation process.
Note: you have to have installed the required Android SDK's and Java Runtime.