Here is some real teeth to cut into your Vampire Load - the power your devices use when you are not using them.
Lawrence Berkeley National Laboratory measured the standby power of many, many, products. See this page for their table which summarizes those measurements, with the average, minimum, and maximum power levels observed while in standby. Power consumption is listed in "watts" (W). See the FAQs for a detailed explanation.
The lab offers clues to products with standby power use: