back, SF! Motivation can be hard to find. Perhaps you can write a list of the reasons why you want to do this? You might also want to look at The Beck Diet Solution by Judith Beck. Some people have found it really helpful in terms of cementing why they want to do this and how to get their mind wrapped around the psychological aspects of weight loss.
There are also lots of posts here and in the main forums about different ways to get motivated: do a search and I'm sure you'll find some good ideas.
Anyone have any ideas on motivation they can post?