When coming off a cycle, I would SLOWLY decrease calories to a maintenance level.
I would NOT add in any cardio.
I MIGHT drop a day of training, or an exercise, or a couple sets out of my workout plan.
An important thing to remember tho, is that you will lose your strength gains if you do not keep using the weights that you built up to. Granted, you might lose a little strength after a month or so, but if you keep the muscle exposed to a volume of training equal to or greater than what you were using when "on", the chances of keeping gains is much greater. For instance, when "on" maybe you could bench 400 for 3 sets of 3 (400 x 3 reps x 3 sets = 3600). So when you come off you might lose a little strength, but if you use just a little less weight and still keep the volume high enough to match total weight lifted, your muscles will have no choice but to stay strong (example: 375 x 4 reps x 3 sets = 4500).
Keep a positive attitude: if you think you are going to get weaker and smaller, I gaurantee you, you WILL get weaker and stronger.
You can also add in some "gainskeepers" like anit-e's, creatine, glutamine, BCAAs, tribulus, etc...