If you are planning on storing extra fuel for a generator or just keeping a reserve on hand to avoid a rush in crisis events, store it safely and check on it periodically to make sure it is secure and fresh.
http://www.ehow.com/how_5864810_store-gas-cans.html
This is a companion discussion topic for the original entry at https://peakprosperity.com/how-to-store-gas/