So I got rearended yesterday....

[CastIron]

There's a lot of good ideas and opinions on here. I'm definitely going to be looking into shoulder belts and a modern seat.
For the record, I was driving a compact sedan and was rearended by a small suv. They weren't going very fast, but it was enough to cause $2k damage in the rear of my car and make the driver's seatback bend back. And I had a sore neck for about 4 days.
I realize that if I was hit in my truck by a smaller car the damage wouldn't be as bad. (at least on my truck) But it seems like where I drive full size trucks and suvs are really common. And most of them probably weigh at least as much as a half ton 2wd truck. So that's why I started this thread. I'd like to stack the deck in my favor, just in case.