The most known method of breathing easier throughout the night is the strips to cover a patch of your nose. The pioneers of this technology are the good folks from Breathe Right, although you might be able to find some cheaper alternatives now that their strips have been on the market for some time. These strips open your nasal passages through exerting pressure on the outside of your nose, so that the user can sleep with their mouth closed which reduces snoring.
Of the devices that are on the market, these strips seem more geared to mild snoring or people who simply wish to reduce the noise. If this is you, considering the strips could be the easiest of all of these solutions.
Another device goes in your nose rather than outside it. By lightly clipping to your septum, this device clears a path on either side of your nose effectively.
This is a similar approach as the strips. The end result is the same in that it encourages the user to breathe nasally rather than through his or her mouth. This product comes courtesy of the good folks at Breathe EZ, who encourage consumers by saying that you are required to retrain your method of breathing at night with these products. So give them a chance, before you're certain they aren't working.
In terms of medical recommendation, most professionals might point you in the direction of a custom fit mouthpiece. These come regarded due to the least amount of time to get used to. These pieces do not require you to train your body to breathe nasally, which means they can really start working faster.
Typically, there are two types of these devices. One holds the tongue comfortably in place to keep it from blocking the windpipe, which has been a diagnosed cause of mild sleep apnea.
The second, works by gently keeping your lower jaw out farther than it typically is. This, easily allows air to pass through. Any good mouth piece, and you should invest in at least a mid range piece for the comfort and effectiveness, should be fitted by a professional such as your dentist. This increases the results by making it completely custom for you.
A lot of these products are making a big buzz about their stop snoring promises. There is something for everyone now so you have nothing to lose, but some sleep you or someone you know could gain.