Since this was bumped.... Here's my list of what I've done or had go wrong... other than the basic tune-up and fluid changes above.
Check (well, just replace) your cabin filters now. And depending on where you live, and what you park under... about every 10k miles. ~$12-$20 depending on where you get them.
~85k miles, an evap valve went bad. It was a $30 part and 1hr of removing the driver rear plastic to get in there.
~90k miles, my A/C blower motor started to squeak, very occasionally. I bought a new one for $50, just haven't put it in yet. I THINK this was spurred by windows being cracked when a storm blew in.
~90k miles, rear parking brake needed adjustment at the handle.
~95k miles was my first front brake job and it needed a wheel bearing at the same time. Wheel bearing I have down as $277... can't remember if I did both or just the bad 1.
100,040 miles, the plastic fitting into the heater core broke and blew coolant everywhere, leaving me stranded road side (45min until I realized I could remove that fitting and hook hose back up). There are 2 plastic fittings here... one can be removed completely OR replaced with a metal one. The other T-fitting has to be kind of rigged up to be replaced with a metal one. just search "heater core fitting" and you'll get a bunch of threads about them.
106k miles, rear brakes.
107k miles, driver window motor and regulator. It was getting spotty and sticking. You can usually slam door, or knock near the cup holder to free it up. Parts were ~$300... but i think that was an employee dealer cost.
Random thoughts...
Consider a rear cargo cover, if you don't want people snooping on what you have back there... and I think it quiets the road noise down a bit (at least with my M/T tires)
Consider cleaning the MAF sensor (I haven't, its just an easy thing that might as well be done)
My Wheel bearing might be because I wheel the truck. I don't beat on it, but it has 285/75r16 M/T tires and a 2in lift that isn't IDEAL (cheap spacer lift).
Depending on color and year, sometimes the paint isn't great... keep an eye on the roof channels, it'll crack there, which lets rust start on the body and near windshield edge.