GoDaddy shared hosting with domain registed at a different registrar

When you sign up for Godaddy shared hosting they usually send you and email afterwards with the server's IP. Once you have the IP address go to the site that is hosting your domain name and change the Host (A)Record within the DNS setting to reflect the new IP address. It will take an hour or an hour and a half based upon what the TTL is set to.

GoDaddy's Change nameservers for my domains support article will tell you what nameservers to use based on where your domain is registered and who your hosting provider is.