I've been doing some 'cold calling' to people that have recently been sent something in the post. Like most people, I don't like cold calling, because either you can't get through to the people you want, or people aren't interested. However, I'm pleased to report that I've had a modest amount of success.
I can't explain how much better I feel about everything now. It might well come to nothing, but it feels very good (especially as I've hardly started this whole process).