From memory if the Xwind correction for GS is less than 5 knots don't worry. If it's more then factor it in.
Remember with the gear down stuff to add the penalties for climb and descent! You will get a gear down question, an engine failure and diversion from 1500 feet, at least 2 PNRs, and an ETP (remember the ETP always moves into wind and the wind is always from the west, if only one answer moves into wind, then that is the one! Just make sure you check if the answer is the distance from departure or destination, this can catch you out!)
Practice practice practice, flight planning is not hard, just make sure you are methodical and practice practice practice!