I do that thing where I pledge not to delete anything that I write.
I'm fickle and I write a million beginnings of things. This blog is a prime example. I have 5 posts spread across 3 years including this one. I'd say at least 60% of those now make no sense. Work that one out.
On my Mac I have pages and pages of the beginnings of books and reports and essays which I have started. None relating to the other. I have business plans for various get rich quick schemes and hobbies which I think can become careers, emails I have sent to friends asking for advice and business proposals on Elance. Once I have finished that initial bit though, once the first page is done and the concept is on paper, I immediately hate it. I want nothing more to do with it. I can't look back over the posts on this blog because I hate them.
Edit: I deleted two of the blog posts.