Another way to get your motivation back is to seek out a photo meetup near you (www.meetup.com) these can be anything from a group of people getting together for a walk through an area to a small group that is being given access to a museum or gallery for an hour or so before it opens to the public to a weekend away in the country with a host of different activities and styles of photography (landscapes to portraiture). The cost can range from free to £300-£400 depending on what it is. Most are £20-£30 and like the photography challenges highlighted previously this can be a great way to find motivation to get out shooting again.
 

If you can't find one you like then you could always start your own and see if you can't get a few like-minded individuals to join you on your next trip to your favourite spot. Even if you have photographed it from every angle the fact that others are there will be the perfect opportunity for an exchange of ideas and that will get your creative juices flowing again and you will probably find a new way of looking at the area.