If you want to avoid situation when after server restart you have to start lots of services manually, a little thing like chkconfig would come in handy.
First you might want to take a look at a list of services handled by chkconfig:

chkconfig --list

You should see something like this:

mysql 0:off 1:off 2:on 3:on 4:on 5:on 6:off
named 0:off 1:off 2:off 3:on 4:off 5:off 6:off
sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off

To add for example mysql to autostart list simply type:

chkconfig --add mysql on

To remove a service from autostart list type:

chkconfig --del mysql

For full list of chkconfig options go here.