Power Schedule is a lightweight app that allows you to set an On/Off schedule for Airplane Mode (Telephony), WiFi, Bluetooth and Data connection. Ring Profile can be automatically switched between Silent and Normal.

You may want to set WiFi to off when you leave for work in the morning. Then back to on when you're home again and in range of your personal wireless network. Setting the phone to off will not completely power off your Android device, so you'll still have your alarms active.