I have been trying to declutter my home for the last few years. I've tried lots of different methods and I'm finally starting to feel like my space is usable now. When things get a little messy, it normally doesn't take more than twenty minutes to straighten up. The method that really helped me was the KonMari method based on the book "The Life-changing Magic of Tidying Up" by Marie Kondo. I typically use her method to clean out my closet every few months. I try to bring new items into my wardrobe and mix it up regularly so it doesn't get stale. I'll often buy a few things in a style I want to try out, and then after a few months, I'll KonMari my closet and purge things that don't bring me joy.
Why I love the KonMari method is the focus for decluttering is positive. The goal is to find the things that make you happy and bring you joy. Then you are letting the other things go where they can fulfill their purpose and find someone else that they bring joy to. I find this method makes it much easier to let go of things you might have a sentimental attachment to, but aren't really important to you.