Welcome to BHQ!
What you want to do is start with all your basic bolt ons.......Pipes, Filters, Adjustable Timing Plate, Cool Head or Milled Head, Reeds...etc.
When you are ready to buy I would call a site sponsor on here, or you could even find some great deals from other members in the for sale section.
Find you some nice used pipes on here, and throw some air filters on. Just those two things will make your bike a whole new beast. ANYTHING you do that changes the air/fuel....you need to re-jet. To suggest some good all around pipes too you, I really like Pro Circuits. They have great low end, but they rip really hard on top. I personally run CPI's. CPI's don't have near the low end as the pro circuits, but mid to top the pc's don't even compair to the CPI's.
Lots of stuff to think about and lots of good info and reading on here. Everyone has there own opinion on what part is better.