Last night I went to Confession (that's where you confess your sins to a priest), and I confessed to getting annoyed with drivers that slow me down. I was advised to offer the circumstance as a sacrifice, and that way each situation could therefore be beneficial to me rather than a source of annoyance. Well, I've certainly had to practise that today - so many slow and annoying drivers. Amazingly enough it worked, it kept me calmer than normal.