Allergy shots. You got to an allergist, tell them what you have, and they scratch you with a bunch of likely allergens, find out what you're allergic to, and shoot with an ever increasing dose 1x-2x week until you're done then give you regular maintenance shots.

The pills are whatever is cheapest. I find the Nasonex (nasal spray) and Pataday (eye drops) (or whatever the generic is these days) really do a much better job with symptoms than the pills ever do, but the pills are much cheaper, so it's my first line.