One of the most vital safety devices in your vehicle are your mirrors. Traffic situations change rapidly and keeping on top of this changing environment takes vigilant use of properly adjusted mirrors. Also keep in mind that using your mirrors is a skill and as such should be practiced until you are comfortable with this new setup. Given most drivers ed courses don't teach proper mirror setup, follow this procedure and you'll be a safer driver.
First off, let's setup your mirrors properly and follow this video from our driving tips collection. This will probably be different from what has classically been taught in drivers ed, but stay with it! It will be uncomfortable at first but after a while you will wonder how you could drive without properly adjusted mirrors. Please view the folliowing video for a demonstration on how to correctly setup your mirrors.