If you've ever wanted to get directly involved in the work that conservationists do, check out Earthwatch. They have projects all over the world and as a volunteer you get to experience every aspect of work in the field. I joined a project in northern Ghana a couple of years ago helping set up a reserve and monitor hippos. It was tough; very hard work and certainly not a holiday, but extremely rewarding and there's nothing quite like it for seeing conservation work at first hand.
Charting the ups and downs of saving a small part of Britain's farming heritage, Kate's new book about her beautiful Monmouthshire arm is just out in paperback.