For recreational racers that just completed skiing take a month off without any form of skiing and then start ramping it up through the spring going once a week. Increase frequency in later summer and fall to 2, 3 and 4 times a week if possible. Unless you can get on-snow rollerskiing is the most ski specific training you can do. If you are new to roller skiing start in a flat, empty parking lot. Always wear a helmet.