Various important examples which come up on Shabbos in conjunction with the halachas of perfuming or putting in a nice smell into an item;
Is there a problem with unfolding clothing (e.g., TALIS, pants, etc.) on Shabbos and folding a paper napkin on a line;
דבר דבר (Dabair Davar): Mentioning an Action Which Could Be Done the Proper Way;