One of my favorite upgrades to my XJ has been the LED lights. They really light up road signs and anything reflective like stripes on the road or center reflectors. They also work great in the fog and rain.
Correcting the steering on my Renix era Jeep Cherokee with a new drag link tie rod.
After replacing my track bar, I still had play in the steering. The next worst spot was the drag link. I noticed this was loose when I was trying to center the steering wheel after changing the track bar.