These are general tips for simple tuning (if not using Entity Beans):
- pre-compile your JSPs
- disable your hot deployment scanner
- increase your EJB pool.
- increase your min/max request processor threads (tomcat)
- if u r in a multi-cpu machine tune gc algorithms
- remove any unused mbean.
- set log level to error and disable
- use a fastest jvm (such as jrockit)
In addition you can find useful information in www.amitysolutions.com.au/downloads/JBoss_code.pdf