So remembering this for whenever I have to caulk anything again: using an ice cube: The caulk will not stick to the ice, and the ice will melt to the shape of the joint to become the perfect shaped tool. Thanks Apartment Therapy!
Long reach paint pad keeps tight spots neat. If you have a tight spot to paint, remove the pad from a paint edging tool (about $2 at home centers). Hot-glue the pad to a stir stick, and you've got a painting tool that will fit behind toilet tanks and radiators.