#1 – Stop Dusting the Bookshelves
That is just extra work that you can do without very easily. Instead of aligning your books the traditional way, by pushing them all the way to the inside of the bookshelf, you can align them flush with the edge of the bookshelf.
Going at it this way will ensure that you remove any space that will make the collection of dust easy. Household cleaners know this trick and will tell you the same thing.