Well, almost complete. Add:
1. when engaging the pto (on most tractors) for a brush cutter or similar, push in the clutch first (if you have one), then engage the pto, and finally let the clutch out slowly while the pto shaft starts to rotate and picks up the load of whatever is attached (me, the first time I just popped the pto lever, and the engine darn near stalled as it tried to start rotation of the blades on a heavy duty brush cutter).
2. when your temperature gauge starts to creep above the normal operating level, clean the screen in front of the radiator (it's usually clogged with stuff)
3. when anything goes wrong, push in the clutch or otherwise disengage the engine - brakes on most tractors will not be able to stop them against the engine torque
4. put a can of mosquito repellant and a pair of gloves in the tool box on your tractor
5. and, per prior posts, do NOT let your wife realize how much fun you're having - complain a bit after each tractor session