Decluttering one drawer at a time
Here is a straightforward look at this topic for Crazish.
Whole-house decluttering fails because it is exhausting and the results are invisible until the end. One drawer a day succeeds because it takes ten minutes and the drawer is done. Empty it completely, wipe it, put back only what you used in the last year, and put the rest in a box by the door. Tomorrow, the next drawer.
The box by the door is the important part. Anything still in it after a month goes to a charity shop or a neighbour without a second look. Over a season this quiet routine clears cupboards, wardrobes and shelves without a single dramatic weekend, and the habit of asking "did I use this?" starts to shape what comes into the house in the first place.