The state of my kitchen books generally indicate how much I used them! So paradoxically, the most damaged ones are of course the ones I use most, and the impeccable ones, are the ones I use least.
But I am pretty terrible at keeping them according to your advice anyway :)
However, I can share one good advice about magazines - I own a lot of them, both French and English and buy them regularly. I store them in an open cardboard box standing up, but this is not the tip.
The tip is that I order them by month of release, whatever the year, title or language. That way I can easily pick the ones according to the season, i.e now, if I am looking for recipes inspirations before going to the market for example, I would look into the September or October issues of Olive, Saveurs, Elle a Table and the like. It makes my life a lot easier.