Mow, Trim and Mulch
If you'd like your grass and perennials to come back green and healthy next spring, take some time before the first frost to get your yard ready for the winter temperatures.
Mow your lawn right up to the first frost, and then store your mower for the winter. Trim perennial flowers and mulch perennial beds to keep their roots insulated in the cold temperatures. Get rid of annual plants and plants from your garden (a perfect time to start a compost pile if you don't already have one), and prune shrubs and evergreen bushes.
Also important while winterizing your yard: water. Be sure that water is not puddling up near your home's foundation. The ground should slope away from the foundation, and downspouts should carry roof water a few feet away from the foundation.