You can also plant more squirrel proof bulbs such as daffodils or calchicums. Order seeds and purchase growing soil now. Many spring flowers and vegetables can be started now inside the home or a hobby greenhouse. Be sure to punch holes in plastic cups for drainage, if used for growing containers. Continue to feed winter annuals such as pansies.
Liquid fertilizer has the benefit of providing quick uptake of nutrients.
Shorts I just recently taught a class on the use of computers in horticulture at winter school. There are a few things I want to pass along to the agents who were unable to attend the class. Walter Reeves taught a section of the class on horticulture web sites. He showed a listing of numerous web sites and gave a brief overview of information. There is a ton of information out there and the web is a good place to start.