As a single I find that I use my toaster oven for 90% of my cooking; the stovetop and nuke doing the rest. Last time I fired up the "real" oven was to do a T-Giving turkey. Not only is there a tremendous electricity savings, the toaster requires no preheating and is virtually as fast as the nuke.
Also when I boil stuff on stovetop I use a frying pan as the cover for the pot; better contact to the element and less heat loss out the top. In fact for pasta I bring the water to a boil, dump pasta in, put pan on top, and turn burner OFF. 6-8 minutes or so later I've got al dente noodles.