Let's get the usual advice out of the way first - things like 'Make sure you participate', 'Turn your cellphone to silent', 'Be courteous to others'.
Now let's go a little deeper and draw on what researchers and Skillset's training specialists have observed. Here's my pick.
Forgiveness is a health issue.
It may seem less satisfying than holding a grudge and revisiting our moral high ground, but the evidence in favour of forgiveness is clear. It's an investment in our relationships with rewards for both the forgiver and forgiven.