But the great part about your advice is that most of them hit on points that are useful in addition to being green:

Pick the right tool for the job, and if it’s a feasible trip and you don’t have to take a plan, you can save yourself the misery of the airport and enjoy yourself on the way there.

Riding with your friends is fun.

Planning your trips so that you spend as little time in the car in order to get what you need done isn’t just green practice; it’s good practice generally. So is driving your car responsibly and competently, which will save on gas usage as well.

So much of what constitutes day-to-day, useful common sense also corresponds with green lifestyle choices. It’s a wonderful synergy.