I haven’t gotten any bills since, but I switched all my lights over to compact florescents. If you are in Canada, the Dollarama dollar store has them for $1 each. I’ve see them at Walmart for like 6 or 8 dollars for a twin pack, but if you are in the States, then the pricing will be different.
Also, you can turn the monitor of your computer off when you aren’t using it by pushing the button. I leave my computers on all the time, but I manually turn off the monitors when I’m not there. I can’t think of anything else off hand unless you can tell us what else you use that could be bringing your bill up so much.
One other tip may be to do all your laundry at one time, rather than running 1 load each night or a couple of times a week. Basically you want to run your drier loads back to back as the second load will dry faster because the machine is already heated up from the first load. If you just run one load, you miss out on the savings of the second and third loads.
Hope that helps some.