I've found that the key to tire life is to do 3 things:
1. Keep the tires inflated to the recommended air pressure.
2. Rotate and balance. I like buying from Costco because they offer lifetime balancing and rotations. I take my vehicles in whenever I get the oil changed.
3. Keep it aligned. I really believe this is the key. I try to find a national chain where I can buy a 3 year alignment package. This usually doesn't cost much more then the price of 2 alignments and you can bring it in every week if you want to !
My last vehicle was a Honda Element. When I traded it, the tires (Michelins only !) had way more then 100,000 miles on them and were still in decent shape. Admittedly, an Element is a different beast then a truck, but the principals are the same. It's not rocket science. I've been driving for over 45 years and I've learned a few things.
Tim