Seamanship involves a lot of physical skills that can only be practiced on the boat, but good seamanship also involves knowledge and mental preparedness - the sort of thing one can also think about during the offseason to become a better sailor in the future. A good example is being prepared to act if you happen to go aground in your sailboat. Even with modern electronics and a chartplotter it still happens, in part because of inaccurate charts or devices and in part because of shifting shoals in many areas. So it's always good to be prepared, particularly since quick action may be required. Here's a fun quiz to see if you know what to do in certain common situations. To read more about various techniques for getting free after running aground, read this article.