What should I delete off of my T Mobile Samsung phone to make memory space?

What should I delete off of my samsung phoe to make memory? Like other than pictures. Can I delete other things than pictures to make memory space?|||You could delete old text messages, and old ring tones that you don't use anymore.|||Many phones have the pre-loaded ringers and images locked. This means you can't delete them. The only thing I can suggest is try deleting tones you don't use