Sometimes Facebook adds new features and it's almost hair-pulling frustrating to get rid of them, and sometimes Facebook adds new ways to get rid of old features without ever telling you. Here's a few tips to de-clutter your Facebook profile.
Remove Sidebar Chat
Click the "cog" in the lower right-hand corner.
Select Hide Sidebar.
The Chat menu will return to its original tab.
If at any time you want to bring the sidebar back, click the button.
Remove Post Activity From Your Facebook Wall
Scroll down your wall until you find your Recent Activity.
Click x on any Recent Activity that is of you commenting on someone else's wall post.