Here's a simple script to turn off & stop any unnecessary services.
Edit the list as you see fit.

#!/bin/sh
for SERVICE in anacron atd autofs avahi-daemon cpuspeed cups firstboot gpm iptables ip6tables iscsi iscsid kudzu lm_sensors mcstrans mdmonitor microcode_ctl netfs nfslock pcscd portmap readahead_early restorecond rhnsd rpcgssd rpcidmapd setroubleshoot smartd xfs yum-updatesd rawdevices rhsmcertd

do
  chkconfig $SERVICE off
  service $SERVICE stop
done

chkconfig xfs --level 5 on
chkconfig ntpd on

chkconfig --list|grep 3:on|sort