Tag your stories properly. 

There is almost never reason to use less than 5 tags.

As a general rule of thumb: tag with the band(s), idol(s), pairing(s) and genre(s). 

Think about what tags you would search, if you were looking for a story exactly like yours.

If you don't tag your stories properly, nobody will be able to find them. 

Which is a shame. Both for you as a writer, but also for readers.