Lime is also effective in discouraging moss growth because it makes the soil less acid. However it takes iron to give the quick kill. It is a good idea to apply lime to lawns and other plants once a year. Lime should not be applied to rhododendrons, azaleas, blueberries and other acid-loving plants.
This also a good time to get rid of winter weeds while they are still small. One swipe now with a hoe will take out a dozen weeds. Not only are they harder to remove when they are larger but they go to seed quickly and scatter their seeds creating a larger problem. My favorite weeding tool is a hula hoe with flexible blade that is sharp on both sides.
If you have broad leaf weeds in your lawn, use a combination weed and feed product which kills the weeds at the same time you are fertilizing.