I have an image in my mind of what I want, whether it's a light jacket or a one-piece. I can tell if what I want is in the store right away.
About tidying up a toy box, you should let your kids experience the selection process by touching all of their toys. It's also important how they throw away their toys. They can earn a stronger sense of valuing things when they throw things away with respect and appreciation.
There's no need to let your family know the details of what you throw out or donate. You can leave communal spaces to the end. The first step is to confront your own stuff.
The process of facing and selecting our possessions can be quite painful. It forces us to confront our imperfections and inadequacies and the foolish choices we made in the past.
The inside of a house or apartment after decluttering has much in common with a Shinto shrine... a place where there are no unnecessary things, and our thoughts become clear.
Changing lifestyle habits acquired over many years is often extremely difficult.
I recommend tidying by category, not by place. For example, instead of deciding that today you'll tidy a particular room, set goals such as 'clothes today, books tomorrow.'