When in Doubt, Keep It

When in doubt, throw it oubt. When in doubt, keep it. I think either approach is fine. You just need to trust your intuition and be realistic about your space. Most people have some anxt about all this because their systems have never really been totally functional and clear edged before. If you make a clean distinction between what's reference and supplies and what requires action, you can easily keep as much material as you can accommodate.