I love my salad spinner as well! (sure beats putting the lettuce in a kitchen towel and going outside to swirl it overhead, like a former roommate used to do...or maybe not, if you like the arm workout!)
I'd also nominate my new soymilk maker. I haven't even used it to make soy milk yet, but I have a tofu kit now, so I can make my own fresh tofu with it, and I've made several batches of raw nut milks (almond, macadamia, hemp nut, sesame seed) and each batch took less than 10 minutes from start to finish, including cleaning the machine (not including the soaking time for the seeds and nuts).
A food processor is also up there. I had mine for a while, but didn't start using it until this past summer, and I was amazed at how quickly I could whip up a batch or guacamole or hummus dip or moch 'chicken or the egg' salad.
