Don't Fail to Think Ahead
Define the apps you will use, and have them ready to go before you start. Don't rely on students being able to get to the content through the web only.
Organize your apps. Subject Area, Grade, Content, Purpose, etc.
Think ahead and plan to put apps you would prefer students not access in a folder and label wisely. (DO NOT wording may just be what makes them go straight to that folder, though!)