A final way of changing passive to active voice is to simply delete the passive verb. While you will not always be able to use this method, you should be on the lookout for such opportunities. Examples:
Passive: You are advised that you owe JoJo Management, Inc. $1,200 in rent.
Active: You owe JoJo Management, Inc. $1,200 in rent.
Passive: It was brought to my attention that you are submitting your reports late.
Active: You are submitting your reports late.
Passive: You are requested to direct your comments to Phil@PhilVassallo.com.
Active: Please direct your comments to Phil@PhilVassallo.com.