As leptin resistance prevents us from significantly reducing our food intake and lowers our capacity for exercise, the way to deal with it (outside of medication) is to at least try to change what we eat first. This means reducing the number of carbs in our diet and instead focusing on foods such as boiled potatoes, nuts and seeds, whole grains, and meat and fish.
Lowered carbs consumption, together with the rest of the five rules of leptin diets and at least some regular exercise should be enough to start slowly reversing leptin resistance. If not, taking medical supplements may be necessary too.