First off don't be worried about breaking stuff, you ARE going to break stuff, thats just part of the fun. Bash it, break it, fix it, bash it, break it again.
As Silent mentioned rpm makes some great products that are very durable, and RPM products carry a lifetime warranty, if you break it send it back to them and they will replace it free. But they do not make bulkheads, for bulks the only upgrade would be to aluminum which can get costly, so you might want to wait until you bust one before shelling out the money for them. The rpm a arms are very nice, as are the shock towers, bumpers, rims, skids, bulkhead braces, and now they even make axle carriers. All of which are guaranteed forever!
Make sure you install a fuel filter right away, and possibly a better air filter, but the fuel filter is a must!. Both of these items will prolong the life of your engine.
Other than that as you break stuff replace it with better stuff. Good luck with your new truck.