I have gone through SharePoint projects on different scales, I have compiled a planning sheet based on what I have faced during the design phase and also based on Microsoft planning sheets (you can find here).
This sheet provides a way to brain storm all the objects during your SharePoint project.
Note: this sheet doesn't contain all the objects in SharePoint but only the essential that you may face in almost every SharePoint project.
Your comments and updates are most welcomed.
You can download the sheet from link below
SharePoint – Architecture Planningv1.0