I throughly recommend Anita Mountain and Chris Davidson’s blog on Transactional Analysis. I am something of a fan of TA and have found it the single most influential technique for helping me improve my communication and collaborative working skills. The benefit of some blogs (such as this one) is that they offer links to material of value; Chris and Anita’s, on the other hand, is one of those blogs where the posts themselves offer worthwhile and immediately usable insights. If you are new to TA, I can’t think of a more user-friendly and helpful way into the subject. Anita Mountain and Chris Davidson are authors of Working Together.