Here are some great Fall soil amendment tips from the folks at Seattle Urban Farm Company. Check this out for preparing your garden for the winter and giving the soil what it needs for a jump start in spring.
We highly recommend using your own compost when possible so you know where its contents came from. Otherwise be sure to find a reputable source of compost. Many bagged, organic composts include a detail analysis of their makeup.
Our favorite parts about Fall garden maintenance is the chance to walk the gardens, see what is still growing, and dream about what we will grow in Spring. Plus, the gardening can be done at your own pace. You will not have demanding tomato plants growing 2 inches a day and begging you for taller plant stakes!