Check out this great post on how to clean your sewing machine over on Craft Nectar. (All the better to mend with, my dear!) Sewing machine maintenance is something I have never attempted, which probably explains why my bobbin thread is always getting tangled up in dust bunnies! There are some really nice step-by-step photos that demystify this slightly scary-sounding process. Via Whip Up.
How-To: Spring Clean Your Sewing Machine