I think this would be a good opportunity to use @project as context, in addition to blocking out calendar time. Instead of having to haphazardly scan multiple @context lists for possible NAs related to Project Learn Korean whenever blocked study time comes, you’ll only have one list to look at, @Project Learn Korean, and you’ll easily see all the NAs you should do or would like to do. Exceptions would be supplementary tasks that would be done most likely whenever the opportunity arises, such as “buy Korean dictionary”@bookstore, or “listen to CDs”@commute. But the main task itself, since it would be done during blocked period, should have its own list, so you can clearly monitor your progress, and easily see where you left off.