Use stylebot or any other CSS replacement plugin in your browser with this bit of CSS to clean up Facebook timeline. It removes sidebars, ads & suggested posts and some "people you know liked this company" posts.

no-ad-no-suggested-no-sidebar-facebook.css

#contentArea {
    float: none;
    margin: 0 auto;
    max-width: 700px;
    width: 100%;
}

#contentCol {
    margin-left: 0;
    padding-left: 0;
}

._5v3q ._4-eo, .uiScaledImageContainer {
    height: auto;
    width: 100%;
}

[data-ft*='"ei":'], #leftCol, #rightCol {
    display: none;
}