I'm an apartment dweller, so many of the home upgrades aren't possible for me, though when I do buy appliances, energy efficiency is a top concern (recently got a front-loading washer). Line-drying was a no-brainer - why pay when the sun and air will do it for free :-)
Just replaced an energy-hogging server with a low-power version (about 30 watts with little load, 45 with heavy load). It's normally on S3 suspend, and I use WOL to wake it whenever I need it, including remotely (it also wakes itself twice daily, once to do a backup, and once to update a household energy usage chart online).
Bake more instead of frying. Turn off the oven in the last few minutes.
Now that one surprises me. I do have an electric range/oven, and I would have thought that pan-frying would use less electricity than baking - especially since I'm usually baking for at least 30 minutes, whereas cooking in a pan can often be done in 20 minutes or less. I get that the heat is well-retained in the oven whereas a lot is lost on the range, but I don't have a way to actually measure the stove's usage. I do generally put baked items in before the oven's preheated and turn off the oven before the time has elapsed, except when I'm doing breads.