1 - protection - rock sliders, diff guards
2 - mild lift - two inches is enough
3 - MT's
4 - winch/front bumper
5 - rear recovery point
I only have 2, 3, and sometimes 5. The best thing to do is get out there and use it. Join a local LR club and learn the skills. With the right skills, you don't need lockers and all that other mumbo jumbo crap.