How do you write a resume?

I have never had a job before and I have no idea what I am doing when it comes to writing a resume. I need an example of how to write it but none of the example that I have looked at have helped me. I have tried different websites that guide you with writing a resume but they haven't helped wither. I guess it is so difficult because I have never had a job and I don't really know what info to put into the resume. Please help. I am trying to get a job so that I can purchase things for college in the Fall. Your help will be much appreciated. Thanks in advance :)