Using a pop filter helps diffuse the air coming out of your mouth when you speak, and can really amp up the quality of your recordings. This video shows you how to make a basic one out of a few sheets of paper and a tissue.
The video, from YouTuber Ben Galt, not only shows you how to construct a simple pop filter, but also explains why you need one. One of the best ways to make your audio sound better is by speaking close to the microphone, but being closer means the air from your "P's" and "B's" are going to spike up the volume with ugly noise.
We've talked about building your own pop filter before, but Galt's paper pop filter works well enough and you don't need any special tools or materials — assuming you have some sheets of paper and tissues around.