When it comes to home upkeep, it seems there is always something that requires our attention. Of course, the amount of routine maintenance—to keep your space looking its best and head off costly fixes—depends on the dwelling (an apartment presents fewer plumbing, heating, and exterior tasks than a spacious colonial, for instance). But in every case, you’ll need a checklist and season-by-season schedule so you can stay organized—plus some handy know-how for tackling it all with ease.