Whats the easiest way to figure out which of the questions you answered has closed?
It used to be painstakingly annoying to do, and to a degree it still is. But now that the Watchlist is split into Open Questions and Closed Questions in separate tabs, you can use that to track your questions more easily. The only downside is, of course, that you have to add every question you answer to your watchlist for it to be of any use. It’s just one click after answering though, and it saves you lots of trawling through your history later on.