In the previous year (until October 2007) my electricity consumption was 3,062 kwH. Since then I replaced all lamps with the low energy variant, and pull the plug on any electrical device I don't use. The projected consumption for this year (since October 2007) is currently at 1,928 kwH. About 33% less!
Saving a lot of energy appears rather simple: pull the plug. In my case: microwave, digital television, radio, computer (the network card keeps on running while the computer is turned off), and cable modem. All these devices consume energy also when "turned off".
Pulling the plug: it really is that simple!