If you have more than 20 pages, you probably are like me and find the menu editor to be a little clunky in that the menu items are too fat. The list winds up scrolling over multiple pages.
A quick solution is to reduce the size of these through a plugin and some custom CSS.
1) Install 'WP Admin Theme" plugin
2) Add this css to the custom stylesheet:
.menu-item-handle .item-title { padding: 1px 0; }
.item-controls { top: -7px; }
.menu-item-bar { margin-top: 5px; }