Reading the thread about the starter clicking, I was wondering what type of electrical preventative maintenance should I do?

My '95 Beater150 is my project truck and since it's running fine, I figure it's best to rewire (one wire at a time and check the functioning before continuing) as much as I can before I ever run into any issues (if I ever do, knock on wood).

Right now, all I can think of is rerunning ground wires and maybe running extras(?).

Any suggestions?