It depends, some I keep others I carefully remove the patterns from. If I like an article(s) or they seem useful plus they have more than a few patterns I will use, I generally keep the whole magazine. If it is just a few patterns and or no articles I remove the information I want and put them into notebook sleeves/sheet protectors (and into a binder) with any pertinent information (i.e. magazine title, issue, volume, and or season, errata, etc.). It generally depends on how much information I will use from the magazine as the deciding factor. I do empathize with you on your difficulties on deciding what to keep and what to recycle.
Judge: Madame, either you will have to cease knitting or I will have to cease judging. Which shall it be?
Miss Marple: It helps me to concentrate, milord.
Judge: It does not help me, madame.
Miss Marple: Oh. Very well. (puts away knitting)
Judge: Thank you, Madame.
The lyf so short, the craft so long to lerne.
~ Geoffrey Chaucer - The Parliament of Fowls Line 1.