depends what you timing and goals. If there is no time pressure doing slow and steady uncluttering is effective: which includes basics like stop the flow in (try a shopping diet) and remove something each day. If you want to do it more quickly with focus and energy, there are plenty of websites or books like Becker's The Minimalist Home which which walk you through a process. You want to do it NOW? Select a constrained space: a bag, RV, a single room (stand in for studio apartment) that you plan to live out of in the future. What fits stays, what doesn't goes. Won't worry about getting it "perfect" because over time you change so you shouldn't be surprised that your stuff changes as well. Note: this is brutal because almost everyone thinks they need more than the do. The difference between luxury / desire and need is time with the luxury (e.g. adaptive hedonism). One way to help this is box up everything as if you are moving and make it a bit of pain to retrieve from the boxes to encourage you to really ask "do I need it or can I easily make do with what I have?". After 6-12 months get rid of what's left... you didn't use them, so you apparently don't need them.