This video shows the secret of how to dramatically cut down the time and effort it takes to stain your deck while significantly improving the quality of your staining job. Instead of using a regular three or four inch hand-held paint brush for those long sections of flat decking that seem to take forever to brush out, use a "push brush", like the one I'm holding in the video.
The brush itself is simple and can be found at most hardware or home improvement stores. Just look in the car wash or cleaning section for a brush that can be attached to an extension pole. They're just like the ones the folks at the car wash use to clean the front end of your car before they roll it into the car wash. They have a fairly soft bristle, much like a paint brush would have. Make sure that the brush you buy will fit inside of a 5-gallon pail, like the container of DEFY Extreme Wood Stain, which I'm using here.
With the brush in hand, the process is pretty simple.
The first step is to cut in the areas with a smaller hand brush that you can't reach with the push-brush, like under the rails. Once everything is cut in, take the push-brush and just dip and brush. Work in sections and work from one end of the board all the way to other end. It's really just like sweeping or mopping your deck, but instead of a broom or a mop, you're using a brush. Be sure to avoid stopping or breaking in the middle of the boards as that can result in ugly lap marks.
The results look great. The broom not only makes the job faster; it does a great job of really forcing the stain into the wood. That means that your staining job will not only look good, but it will also last longer.