Tweak your Facebook settings

                               Facebook is by far the largest social network on the web, and while Mark Zuckerberg has made plenty of great calls in its design, the site — and the way people use it — isn't as streamlined as it could be. These 20 tips, tricks, and tools will give help take your Facebook experience to the next level. From simple settings options you may have overlooked, to browser plug-ins dedicated to making the social network even better, you're sure to find something on this list that will make your Facebook time even more addicting than it already is.
Tweak your Facebook settings

1. Appear offline to certain friends
By opening your Facebook chat window, clicking the settings icon in the upper right corner, and then navigating to "Advanced Settings," you can customize your chat experience by appearing offline to certain people on your friends list. This tweak will be especially helpful for those of you with chatty acquaintances who like to talk your ear off when you're online.

2. Reposition your Timeline photos
When uploading a new photo, it might not always appear on your feed the way you intended. Particularly long or wide photos have a tendency to be cropped awkwardly, but you can fix this rather easily. By clicking "Edit Photo" from your Timeline page, you gain access to a "Reposition Photo" option. Using this tool, you can move your photo around the preview window so that it appears as you intended.