I totally forgot that I had suggested continuing on the Apartment Therapy January Cure with monthly tasks. This is why I need somebody else telling me what to do and when to go do it.
For March, pick a shelf that needs dusting and dust it! Dust off the stuff on it, too, and dust underneath all the stuff on it. If you have multiple shelves and much energy, dust a lot of shelves. Or dust a counter, tabletop, whatever. Pick a surface that needs to be cleaned off and clean it. Before and after pictures encouraged.
Btw, AT has weekend projects that you can sign up for: