Land Rover Repair: catalyst not ready, countless possibilities, short trips

Question
I have a 98 discovery and had the o2 censor replaced couple months ago. I kept getting the Catalyst Not Ready error from the OBDII reade and could not have the car pass air care. The dealer told me the car has not complete the driving cycle yet. Could you kindly advise how to drive the car to pass the dring cycle quickly. BTW, I have drove it for over a month (mostly short trips to office and shopping) since the sensor replaced. Thanks!

Answer
If the car is not achieveing readiness there is some additional problem that's keeping it from completing the tests.  You may need to look at the detailed engine data on a real LR test system to see what's going on.  There are countless possibilities, so I can't really make a useful guess.