Something I read somewhere that I liked suggested thinking of the stick movements in terms of what they do to the rotors relative to the heli. For example, if you have a nitro heli and the muffler is on the right, then moving the cyclic stick to the right moves the rotor disk towards the muffler. It doesn't matter if you're nose-in, tail-in, upright or inverted, cyclic stick right always makes the rotor disk move towards the muffler. Cyclic stick up always makes the rotor disk move towards the nose. Cyclic stick down always makes the rotor disk move towards the tail (or away from the nose) etc.