I am constantly 'decluttering' because my house is unfortunately not big enough to comfortably display all the things I love! I like being surrounded by beautiful and interesting things but now have a rule of 'one new thing in, one old thing out'! If I don't like something enough to get rid of something else, then I don't buy it/keep it.
Like others on here, I hate the thought of adding to landfill, so I send items like old DVDs, CD cases, broken plastic toys, pens and felt tips etc. to Terracycle - either by purchasing one of their Zero Waste Boxes, or finding a drop-off point local to me. Bit more expensive and time consuming than just throwing things in a bin, but protecting the environment is important to me. Unwanted ornaments, toys and clothing always goes to charity shops. Clothing, old bedding and curtains not suitable for resale, goes into the council's textile recycling bin, but if you don't have one of those then some charity shops provide that service, too.
When I lived on my own I was definitely more minimalist and organised, but living with Husband, children and pets has changed that somewhat over the years! It doesn't help that I'm a frustrated librarian... too many books, not enough shelves! ?