Good dry fly fishing is the best thing on this planet, I think we can all agree on that. When trout are on a hatch it's pretty magical. I'm sure a lot of people have done this but I figured I'd throw it on here anyway. I fish two or three dry flies at once,

 especially during a hatch.

Typically my first fly is pretty large; Stimulator, big caddis, etc. My second fly is typically a smaller Adams, Griffith's Gnat or something in that category. If I throw a third fly on I'll typically use a little RS2 or something in that 24-20 size range.

Fishing multiple dries is a great way to figure out what fish are rising on simply because you can eliminate two or three flies at once. It's also a great tactic for pocket water fishing when dries are king anyways.