The easiest way is to bring the jacket to the workshop. Of course, you can repair a zip without any help. But if there is a hole in a wool jacket, or material is difficult to sew up, it is better to give it to a professional. Until the case, where there is no way to bring it somewhere, we can give a few tips. Always take some rubber cement with you. It will help you in many situations, including repairs. Just put a patch with the help of the glue. A note: glue dries up about 10-12 hours, so sit tight!