Lookin for power in 2001 blazer

What's up folks. I recently bought a 2001 chevy blazer. 2dr 2wd. I want to upgrade and modify to get more power. I am looking to know the extent as to what I can do to the thing. Other than the basics(i.e. headers, exhaust,etc.). Other information that would be helpful would be direction to a place that sells a lot of parts and accessories to fit my blazer. thanks in advance.

later.

K&N filtercharger would be a step in the right direction. They increase airflow through the engine. From there maybe a programmable chip for the computer. Just a few ideas.