Please have a look at this detailed document on Vedic remedies for planets. It talks about various mantras for each planet (in English as well as in Sanskrit), mantra count and yantra etc. Good for ready reference for graha shanti. The document can be found here.
I also found outlook of a Western astrologer interesting on current Olympic games. Please check it out there.
This website has some good posts on Shabar Mantra, would be a good read if you can read Hindi.