No need to wait for spring to flex your green thumb. This is a good time to consider starting seeds indoors.
Make sure they still can get the right soil, amount of light and warmth they need. And, you have to be carefull to give them just the right amout of water, too. But, if done right, you can get a serious head start on your perennial, annual or vegetable/herb garden.
Here are some tips: http://www.gardenweb.com/sesbania/startsds.html
What seeds do you have ready to grow indoors?