Hi Geswalv,
Carefully remove all flowers and leaves, trim the top back by at least a third.

Now read the link below which is for overwintering fuchsias in pots.

If you are going to keep it in a well lit place and 45f it will start to sprout again after a few weeks. The advantage of this is that you can keep removing the growing tips throughout the winter, after 3 pairs of leaves have formed on each stem, which in turn will give you 'a head-start' for next year.

Please come back if you have more questions - Kath:)

Here is a link that might be useful: http://faq.gardenweb.com/faq/lists/fuchsia/2002100206013394.html