Take the high road, act like an adult, respect others on the road around you, be vigilant, be courteous, no cell phones, no texting, stay calm, don't speed, drive responsibly. There's idiot drivers on the road no matter where you go and you just have to expect it can happen anytime you're on the roads. It's just the way it is. Imagine being a commercial truck drivers that have to deal with that stuff every day. Unlike most drivers, I never cut in front of a semi or other big truck (or other vehicles for that matter) if there's a small space to squeeze into because it creates a risk for you and them and others around you.
Although this is in Europe, here's a short clip of a small car getting schmucked on a highway because he was in too much of a hurry. These drivers are all over the place.
Vid clip. This exact same thing almost happened in front of us in CA a couple of summers ago and he/she nearly hit a flagger that happened to be there due to construction work.