In This AutomateIt Pro a set of useful rules:
Vibrate mode during meetings
Max volume when headset unplugged
Lower volume when headset plugged
Unmute by SMS
Conserve power when battery level is low
Quiet at night when screen is off
Automatically turn on/off speaker during call using proximity sensor
Enable/Disable Screen Lock Action – Enables or disables your screen lock slide/pattern/password/pin
Cancel delayed execution by trigger – Auto-cancel delayed execution when defined trigger is launched
Cell ID Trigger – Trigger when connecting or disconnecting from defined cellular cells (Unlimited number of predefined saved locations)
Recurring Event Trigger – Executes a defined action every defined time interval
Composite Triggers – use more than a single trigger for each rule using AND/OR logic between these triggers
Composite Action – execute several actions as a result of a single trigger (which can be a composite trigger)
Rule Active Period – set an active period for each rule. Really useful if you only want a certain rule to be active only during daytime, weekends, just an hour a day etc.
Sensor Trigger – utilize all your device’ sensors as a trigger for a desired action. This includes usage of all the sensors supported by Android – Accelerometer, Light, Proximity etc.
Calendar Trigger – monitor events on your different calendars

Copy Rule – Create a new rule, based on an existing one