Button up the front of the shirt - Put it on a flat surface, bed or a large table, so the whole of the shirt is on the surface back down. Cross the arms in fron of the shirt, the turn the cuffs back towards the shoulders, so that all of the arms are in the upper half of the shirt (I hope tha makes sense) don't crease just lightly fold. Then take the bottom of the shirt and fold it up to the top of the collar. You now should have a shirt that you cannot see the sleeves or collar, take this as it is and put it on top of the suit case put a towel on top. When you reach your destination take it out of the suitcase and hang it up straight away.