IT Policy and Procedures

I?ve been given the task of writing the IT policy and procedures from the ground up. I?m not sure really where to start or what items to include. I?ve have a few ideas such as passwords, internet and email usage, backup and recovery, and a few other things. Can anyone give me any tips on planning these such as experiences you?ve faced and other ideas to include? Any resources would be tremendously helpful and appreciated.

Thanks!