You can drag-and-drop items between keychains -- you just need to enter the passwords for both keychains when doing so. This makes it possible to keep valuable

You can drag-and-drop items between keychains -- you just need to enter the passwords for both keychains when doing so. This makes it possible to keep valuable items in one or more auxiliary keychains set to always prompt (lock after 0 minutes). (This technique isn't a panacea but it contributes to defense in depth.)