So I have to move from my current residence soon. Luckily before I found out I had already begun the process of reducing clutter and getting more organized. Now I'm at the point where I'm selling a bunch of my old CD's to a local record shop since they're taking up space and I never listen to them (similar to ads on websites).
There's a Firefox Add-on that also helps reduce the clutter during your browsing time. Its called Remove It Permanently. It allows you to delete advertising, iFrames and various objects that clutter your screen. It has a lot of advanced configurations, such as Remove from this page only, Remove from all similar pages, this website, etc. Although it might take awhile to remove all the unwanted items from websites you frequent the end result is a much cleaner, less cluttered browsing experience.