1. Never ever drive when intoxicated or tired. A mistake at highway speeds feels a lot different when there are airbags and a ton of steel surrounding you vs. thin air and a pair of jeans.
2. Over 70% of motorcycle accidents are caused by cars. Mostly cars that simply didn't pay attention because see above. I've had three accidents on my bikes: one lady did a U-turn right into me because she had seen a parking spot on the other side of the street (but not me); a guy drove into me while I was standing in line at a red light; another guy backed his car into my bike as he was parking.
I agree totally. I've been a licensed motorcyclist since 1966, was very active until just a few years ago, riding all across the US, journeys of over 5000 miles at a time. Not riding at present due to health issues, hope to resume shortly.
Motorcycling actually kept my drinking lower than it is now. If I rode to a bar on my bike I had 2 drinks at most, often just 1, and as soon as I arrived. Then waited at least an hour from when I finished my last drink before getting on my bike again. Ride impaired on a motorcycle and you won't last long.
I always drive defensively, which means assuming the "cager" (car driver ) is gonna do something stupid & unexpected. Don't wait for it to happen, just know it's GONNA happen, because it invariably does, and so have your emergency out already planned. I got so used to it that cars could come close to killing me and I don't think my pulse rate went up at all, I just kept going as calmly as before.
To your list I would add:
3. Always wear a good, approved helmet. And as much safety clothing as the weather will allow.
4. Take the Motorcycle Safety Foundation (MSF) course. It's a lot of fun, free in a few States (in some dependent on you passing, and some waive their own State motorcycle driving test), and many insurance companies give you a discount.