Ok so, I like Thought Questions : http://thoughtquestions.com/. I think they would make interesting prompts or just cheer you up after a long day. They pair their question with a high quality picture. While I’m not really into self help books ect, the people that produce this have a few blogs that focus on thought provoking images and stories.
I stumbled upon them when I was looking to brain drain the other day. If you have a couple of hours to kill, I highly suggest www.stumbleupon.com. After you “like” a few things then it builds a profile and suggests more of what you like. I’m Schmeggo on there, so you can friend me and see what I’ve liked.