I have been monitoring the computer power usage. see result below
netgear wireless router DG834ON 9.5 watts
HP photosmart 7260 printer, 15w when printing 3w when on.
yusmart 17 in LCD screen 17.5w when on did not see what it was using in power saving mode
Fujitsu siemens Scaleo P 170 w on start up 110w when running.
There are no standby power usage as we switch off.
other items
Tefal 1 cup kettle 0.024kwh to boil 1 cup of water 1.5w in stand by ( it is using about 3kw for 1 1/2 min for each cup)
small cd radio with on off switch no remote. 4.5w in use 2.5 watt switched off by power button guess what we switch of at the mains

std toaster 0.024kwh to do 2 slices of toast ( this was using about 1 kw whislt on)
I have just got my meter back so am playing again. Swapping to a low power pc 16 watt will save us about £30 per year but i am looking at having to spend £200 to do it. so i think it will have to wait until my pc packs up.
my acer aspire one when on and charging the battery was using 30 watts
and old hp laptop hd packing up was using about 65 w no wireless but charging a battery.
I am working on a spread sheet at the moment for working out the running cost of all electrical items in the house and also to show the standby costs as well. you will need the figures from a power meter or the power per cycle dishwasher washing machine etc.
once done i will post as ods and xls so people will be free to modify it. hopefully finish it at the weekend.