I Love the smell of herbs in the winter time and the best way to have that wonderful smell is to dry your herbs..... When you are growing your herbs this summer grow a few extra to dry and use for potpourri.
My favorite herbs for potpourri are:
Rosemary, Mint, peppermint, thyme, sage (I use only the leaves)
Lavender, violets (I use only the flowers)
Caraway, Coriander, Angelica (I use only the seeds)