I dont want all the crap that starts with the default install of slack to start. I dont need the SQL server or the httpd or such. Where do I edit which services start on boot and which ones dont?

Either you can go through your init scripts (which are well documented so you can probably do that safely) or you can stop the processes one by one by looking at ps -aux and killing the pid.

Cool

And those are where? And how does one go about editing then? Using slackware with the full install remember. Not logged in as root right now, but as a default user.

You will need to be root when editing the files. They are in /etc/rc.d/

For the ones that are properly named, such as rc.sshd you can just remove the execute bit from the file:
chmod -x rc.xxx
where xxx is the rc file you don't want executed during startup. For ones that are enclosed inside a runlevel init script, you will actually need to edit the rc file itself, usually I use # (comments) to block out the things I don't want rather than deleting it. This way if I want it back later, or I screw up my commenting somehow, it's not too hard to bring my system back.

Cool

Also you can eliminate some services from starting up in your /etc/inetd.conf file, like FTP, Telnet... etc.