Family Tree DNA will be switching to SmartMatching soon. SmartMatching will eliminate so-called matches outside one's subclade from showing up on the Y-DNA Matches page.
In order to make the best use of SmartMatching, it is important that each man be fully tested for SNPs (Single Nucleotide Polymorphisms). SNPs are simply changes at single places on the y chromosome. They happen infrequently enough that they can be used to classify large numbers of related men into what are called "haplogroups" and subclades of haplogroups.
The best way to be fully tested for SNPs is to order Family Tree DNA's Deep Clade test. The easiest way to do that is from the link on the "Haplotree" page of one's "myFTDNA" pages.
Right now is a good time to order the Deep Clade test. Family Tree DNA is offering a 20%-off sale on its Deep Clade and Deep Clade upgrade tests right now.
I hope many men will take advantage of this discount and get themselves fully tested.