Replying to First attempts sliding a rail.. Protips?

So I like to think of myself as a solid intermediate skiier. Comfortable with air, flat boxes and basic features.. very capable of board sliding rails on skateboard.. but am pretty shook when it comes to sliding a rail sideways on my skis. Going skiing tomorrow and going to push myself to learn them.. What are some pro tips? Focus points? Any advice on how I can avoid catching an edge and becoming acquainted with the rail?