As bhg481 indicates, the savings to be made from not leaving appliances on standby are actually quite minimal, often only adding up to a pound or two per year for each device.
However, even though it's not on your list, one device that tends to be on 'standby', even though it appears to be 'off', is an inkjet printer. Simply placing a portable radio next to a printer when it's theoretically 'off' can result in a lot of interference on the radio, showing that there's electrical activity from within the printer. (i.e. even though it appears to be 'off', it's actually only on 'standby').
While I'm mentioning radios, it's worth noting that receiving DAB stations typically uses 14 times the power of receiving FM ones. So, if you're really trying to save money and you can choose between listening to your favourite station on FM or DAB, always go for the FM option.