Apache - Improvements

Web Environment

OS - Linux 2.6.18 x86_64
Apache - 2.2.17
Openssl - 1.0.0d
Weblogic - 10

I have been running my application through apache since 2 months. Recently I have heard that enabling mod_deflate could improve performance. I have seen the difference after enabling it.

Can you please tell me what are different ways I can improve the performance?

More details::

Compiled in modules:
  core.c
  mod_authz_host.c
  mod_include.c
  mod_filter.c
  mod_charset_lite.c
  mod_deflate.c
  mod_log_config.c
  mod_log_forensic.c
  mod_env.c
  mod_mime_magic.c
  mod_headers.c
  mod_usertrack.c
  mod_setenvif.c
  mod_version.c
  mod_proxy.c
  mod_proxy_connect.c
  mod_proxy_ftp.c
  mod_proxy_http.c
  mod_proxy_scgi.c
  mod_proxy_ajp.c
  mod_proxy_balancer.c
  mod_ssl.c
  worker.c
  http_core.c
  mod_mime.c
  mod_status.c
  mod_autoindex.c
  mod_asis.c
  mod_cgid.c
  mod_negotiation.c
  mod_dir.c
  mod_alias.c
  mod_rewrite.c
  mod_so.c

Note: Please let me know the improvements related to APACHE ONLY. (not linux & weblogic)