system --> services...
stop these services... and uncheck checkboxes....
"anacron", "apmd", "atd", "avahi-daemon" "bluetooth" (if you dont use), "cpuspeed", "cups", "cups-config-daemon", "mdmonitor", "nfslock", "rpcgssd", "rpcidmapd", and "sendmail".
click on save button...
i Edit RunLevel, select RunLevel 3 and do the same and save... ( default is RunLevel 5 )