Depending on where you get your DVR, it may or may not have the ability to skip commercials. The best ones have a button that lets you jump forward, but if your DVR was issued by a cable or satellite company, they may have hidden or removed it. Here are some semi-secret ways to do it anyway.
via Web News Blogs http://lifehacker.com/how-to-enable-a-hidden-commercial-skipping-button-on-an-1440417736