First 3 mods? Before you start modding I really think you should try this one simple trick before you swipe your card:
TAKE IT OFFROAD
Learn about your Jeep! Learn how to use lockers (if equipped), learn how to use front sway bar discos (if equipped), and learn about your transfer case ranges. Learn how to air down your tires for aided traction. Learn learn learn.
Far too often people buy mods without realizing if they had simply hit the trail first they could have purchased something far more useful to them. Cut your teeth on a trail and learn your limits. You may realize you don't need something right away that sounds super popular.
But, to answer your question, I suggest your first 3 mods are:
- Tow strap
- Map of your local wheeling areas
- Full tank of gas