I bet you could tell me exactly what's in your clutter - clothes, paperwork, half-done projects... But do you know what the reason is behind your clutter? Why does it continue to accumulate? Why do you feel powerless to stop it?
It's much easier to tackle a problem if you know what you're dealing with. Is your clutter because of:
Emotional avoidance? You have lots of items with memories attached - you don't really want the things anymore, but you don't want to get rid of the memories.
Physical limitations? Your knees aren't as young as they used to be, and just the thought of a day spent clearing clutter makes you tired.
Exhaustion? You work a full day, and then there's all the usual housework - you're just too tired, mentally and physically, to add in anything else.
Lack of time? You have a full schedule, every single day, from sun-up to sun-down. There's no way you could find 5 extra minutes, let alone 5 hours.
Love of shopping? You love to go shopping. It's your hobby, and it's relaxing. But when you look around your home, you realize it's filling up with stuff you don't really need.
Procrastination? You feel like you work best under a deadline. You usually get things put away before company comes over, but otherwise - it just sits there.
Feeling overwhelmed? You'd like to tackle the clutter, but you don't know where to start. And if you're honest with yourself, just thinking about the project makes you feel anxious.
Once you figure out the reason for your clutter, you can come up with some strategies. If it's shopping, maybe you give yourself a dollar or a size limit for your next excursion. If it's lack of time, maybe you can schedule in some de-cluttering time in the future - before you get booked up. If you're overwhelmed, maybe you consider bringing in a pro to help you develop a plan.