We realize that people don't get as much mail as they used to, but that doesn't mean companies and governments don't send you important documents through the mail anymore. And while it might be tempting to open those envelopes from the top (that is how they're supposed to be opened, after all), there's actually a much easier way. Opening your mail from the side is quicker and much less frustrating.
However, this one comes with a caveat, as you really want to be careful not to accidentally rip up any of the contents inside the envelope, especially if there is a check or money inside.