Get a grease gun and get to all of the chassis grease zerks on the front of your truck. There are about 100 other things you can do while you are underneath there. Give your brakes a good once-over & see what kind of shape the pads & rotors are in; inspect caliper action while a helper presses the brake pedal. Thoroughly examine the steering linkage & wheels hubs. You will be shaking the tires @ different positions while the front tires are off the ground. Also, have another person turn the steering wheel while you are under it, observing gearbox & follow linkage all the way to tie rod ends @ the spindle. Flush the power steering system.